Research areas

  1. Published

    A synopsis of the genus Pouzolzia Gaud. (Urticaceae) in tropical Africa

    Friis, Ib & Jellis, S., 1984, In : Kew Bulletin. 39, p. 587-601

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Published

    Additional notes on Somalian Sapindaceae

    Friis, Ib, 1984, In : Kew Bulletin. 39, p. 779-783

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Published

    Additions to the Flora of Ethiopia

    Friis, Ib & Vollesen, K., 1984, In : Willdenowia. 14, p. 355-371

    Research output: Contribution to journalJournal articleResearchpeer-review

  4. Published

    An analysis of the protologues of new genera with new species in Forsskål's Flora Aegyptiaco-Arabica

    Friis, Ib, 1984, In : Taxon. 33, p. 655-667

    Research output: Contribution to journalJournal articleResearchpeer-review

  5. Published

    Proposal to conserve 1648 Graphorkis Du Petit-Thouars (1804 - Orchidaceae) with a conserved type

    Friis, Ib & Rasmussen, Finn N., 1984, In : Taxon. 33, p. 114-116

    Research output: Contribution to journalJournal articleResearchpeer-review

  6. Published

    Studies in tropical African Urticaceae and Moraceae

    Friis, Ib, 1984, Uppsala, Sverige: Anacapri. 40 p. (Acta Universitatis Uppsaliensis, Vol. 761.).

    Research output: Book/ReportDoctoral thesisResearch

  7. Published

    The spelling of Pehr Forsskål's family name

    Friis, Ib & Thulin, M., 1984, In : Taxon. 33, p. 668-672

    Research output: Contribution to journalJournal articleResearchpeer-review

  8. Published

    Validation of names of new species by reference to previously published descriptions of new genera without valid species names

    Friis, Ib, 1984, In : Taxon. 33, p. 301-308

    Research output: Contribution to journalJournal articleResearchpeer-review

  9. Published

    Validity of names published by Forsskål and Aublet

    Friis, Ib, Brummitt, R. K., Hepper, F. N., Jeffrey, C., Taylor, N. P., Verdcourt, B., Howard, R. A. & Nicolson, D. H., 1984, In : Taxon. 33, p. 495-496

    Research output: Contribution to journalJournal articleResearchpeer-review

  10. Published

    A synopsis of the genus Obetia (Urticaceae)

    Friis, Ib, 1983, In : Kew Bulletin. 38, p. 221-228

    Research output: Contribution to journalJournal articleResearchpeer-review

  11. Published

    Myriader af liv [regnskoven]

    Friis, Ib, 1983, In : Levende Natur - Tidsskrift for international naturbevarelse. 3, p. 3-7

    Research output: Contribution to journalJournal articleCommunication

  12. Published

    Note on the botanical collections of Pehr Forsskål

    Friis, Ib, 1983, In : Kew Bulletin. 38, p. 457-467

    Research output: Contribution to journalJournal articleResearchpeer-review

  13. Published

    Phytogeography of the tropical north-East African mountains (Ethiopia, Djibouti, Somalia)

    Friis, Ib, 1983, In : Bothalia. 14, p. 525-532

    Research output: Contribution to journalJournal articleResearchpeer-review

  14. Published

    The acaulescent and succulent species of Dorstenia sect. Kosaria (Moraceae) from NE tropical Africa and Arabia

    Friis, Ib, 1983, In : Nordic Journal of Botany. 3, p. 533-538

    Research output: Contribution to journalJournal articleResearchpeer-review

  15. Published

    Name changes for well known species of Boehmeria (Urticaceae)

    Friis, Ib & Marais, W., 1982, In : Kew Bulletin. 37, p. 163-163

    Research output: Contribution to journalJournal articleResearchpeer-review

  16. Published

    New taxa from the Imatong Mountains, S. Sudan

    Friis, Ib & Vollesen, K., 1982, In : Kew Bulletin. 38, p. 221-228

    Research output: Contribution to journalJournal articleResearchpeer-review

  17. Published

    Studies in the flora and vegetation of SW Ethiopia

    Friis, Ib, Rasmussen, Finn N. & Vollesen, K., 1982, In : Opera Botanica. 63, p. 1-70

    Research output: Contribution to journalJournal articleResearchpeer-review

  18. Published

    The identity of Rumicicarpus ramosissimus Chiov. (Tiliaceae)

    Friis, Ib, 1982, In : Nordic Journal of Botany. 2, p. 111-113

    Research output: Contribution to journalJournal articleResearchpeer-review

  19. Published

    The identity of Urera longifolia and U. oligoloba, a supplement to Chew's monograph of Laportea (Urticaceae)

    Friis, Ib, 1982, In : Nordic Journal of Botany. 2, p. 231-233

    Research output: Contribution to journalJournal articleResearchpeer-review

  20. Published

    The typification of Forsskaolea viridis Ehrenb. ex Webb (Urticaceae)

    Friis, Ib, 1982, In : Taxon. 31, p. 727-729

    Research output: Contribution to journalJournal articleResearchpeer-review

  21. Published

    What causes the first-order magnetic transition in solid 3He

    Bak, P. & Rasmussen, F. B., 1 Sep 1981, In : Physica B: Condensed Matter. 108, 1-3, p. 849-51 3 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  22. Published

    Experiment on the melting pressure of spin polarized He3

    Chapellier, M., Olsen, Malte & Rasmussen, F. B., 1 Aug 1981, In : Physica B: Condensed Matter. 107, 1-3, p. 31-32 2 p.

    Research output: Contribution to journalJournal articleResearch

  23. Published

    Fluctuation-induced first-order nuclear magnetic transition in solid 3He

    Bak, P. & Rasmussen, F. B., 19 May 1981, In : Physical Review B. Condensed Matter and Materials Physics. 23, 9, p. 4538-4540 3 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  24. Published

    Zero-pressure organic superconductor: Di- (Tetramethyltetraselenafulvalenium)-perchlorate [(TMTSF)2ClO4]

    Bechgaard, K., Carneiro, K., Olsen, Malte, Jacobsen, C. S. & Rasmussen, F. B., 30 Mar 1981, In : Physical Review Letters. 46, 13, p. 852-855 4 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  25. Published

    Superconductivity in (TMTSF)2 ClO4 at zero pressure

    Bechgaard, K., Carneiro, K., Jacobsen, C. S., Olsen, Malte, Rasmussen, F. B. & Rindorf, G., 1 Feb 1981, In : J. Molecul. Crystals and Liquid Crystals. 79, p. 271-275 5 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  26. Published

    A note on effective publication

    Friis, Ib & Dahlgren, R., 1981, In : Taxon. 30, p. 499-501

    Research output: Contribution to journalJournal articleResearchpeer-review

  27. Published

    A synopsis of the genus Girardinia Gaud. (Urticaceae)

    Friis, Ib, 1981, In : Kew Bulletin. 36, p. 143-157

    Research output: Contribution to journalJournal articleResearchpeer-review

  28. Published

    Notes on Somalian Sapindaceae

    Friis, Ib, 1981, In : Kew Bulletin. 36, p. 139-141

    Research output: Contribution to journalJournal articleResearchpeer-review

  29. Published

    The taxonomy and distribution of Mimusops laurifolia (Sapotaceae)

    Friis, Ib, 1981, In : Kew Bulletin. 35, p. 785-792

    Research output: Contribution to journalJournal articleResearchpeer-review

  30. Published

    Production of highly polarized solid 3He in a Pomeranchuk cell

    Rasmussen, F. B., 1 Jul 1980, In : Journal de Physique. Colloques. 41, C7, p. C7: 89-94 6 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  31. Published

    Proposal to conserve the generic name Hagenia J. F. Gmel. over Bankesia Bruce (Rosaceae)

    Friis, Ib, Hepper, F. N. & Jansen, P. C. M., 1980, In : Taxon. 29, p. 511-512

    Research output: Contribution to journalJournal articleResearchpeer-review

  32. Published

    The authority and date of publication of the genus Casuarina (Casuarinaceae) and its type species

    Friis, Ib, 1980, In : Taxon. 29, p. 511-512

    Research output: Contribution to journalJournal articleResearchpeer-review

  33. Published

    The identity of the Ethiopian monotypic genus Tzellemtinia Chiov

    Friis, Ib & Vollesen, K., 1980, In : Botaniska Notiser. 133, p. 347-349

    Research output: Contribution to journalJournal articleResearch

  34. Published

    Spin polarization of liquid 3He by rapid melting of polarized solid

    Chapellier, M., Frossati, G. & Rasmussen, F. B., 20 May 1979, In : Physical Review Letters. 42, p. 904-907 4 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  35. Published

    Dombeya torrida, the correct name for James Bruce's "Walkuffa"

    Friis, Ib & Hepper, F. N., 1979, In : Botaniska Notiser. 132, p. 397-398

    Research output: Contribution to journalJournal articleResearch

  36. Published

    The wild populations of Coffea arabica L. and the cultivated coffee

    Friis, Ib, 1979, Taxonomic Aspects of African Economic Botany: Proceedings of the IXth Plenary Meeting of AETFAT.. Kunkel, G. (ed.). Las Palmas de Gran Canaria., p. 63-68

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  37. Published

    A reconsideration of the genera Monotheca and Spiniluma (Sapotaceae)

    Friis, Ib, 1978, In : Kew Bulletin. 33, p. 91-98

    Research output: Contribution to journalJournal articleResearchpeer-review

  38. Published

    East African bryophytes IV. Danish collections

    Bizot, M., Friis, Ib, Lewinsky, J. & Thamas, P., 1978, In : Lindbergia. 4, p. 259-284

    Research output: Contribution to journalJournal articleResearchpeer-review

  39. Published

    Properties of melting  3He: specific heat, entropy, latent heat and temperature

    Halperin, W. P., Rasmussen, F. B., Archie, C. N. & Richardson, R. C., 1978, In : Journal of Low Temperature Physics. 31, p. 617

    Research output: Contribution to journalJournal articleResearchpeer-review

  40. Published

    Specific heat of normal and superfluid 3He on the melting curve

    Halperin, W. P., Archie, C. N., Rasmussen, F. B., Alvesalo, T. & Richardson, R. C., 1 Mar 1976, In : Physical Review B. Condensed Matter and Materials Physics. 13, p. 2124-2131 8 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  41. Published

    Pelargonium boranense sp. nov. (Geraniaceae)

    Friis, Ib & Gilbert, M. G., 1976, In : Flowering Plants of Africa. 43, p. Tab. 1705 + 4 pp. text

    Research output: Contribution to journalJournal articleResearchpeer-review

  42. Published

    Omkring en berømt dansk botaniker i Indien [Nathanael Wallich]

    Friis, Ib & Hamann, O. J., 1976, In : Naturens Verden. 1976, 12, p. 393-408

    Research output: Contribution to journalJournal articleCommunication

  43. Published

    Progress made in the botanical exploration of Africa: Ethiopia

    Friis, Ib, 1976, In : Boissiera. 24, p. 599-599

    Research output: Contribution to journalJournal articleResearch

  44. Published

    Studies in the genus Haemanthus (Amaryllidaceae) IV. Division of the genus into Haemanthus s. str. and Scadoxus, with notes on Haemanthus s. str

    Friis, Ib & Nordal, I., 1976, In : Norwegian Journal of Botany. 23, p. 63-77

    Research output: Contribution to journalJournal articleResearchpeer-review

  45. Published

    Thermodynamic temperature scale derived from measurements of 3He latent heat

    Rasmussen, F. B., Halperin, W. P., Archie, C. N. & Richardson, R. C., 24 Mar 1975, In : Physical Review Letters. 34, 12, p. 718-721 4 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  46. Published

    Linociera giordanoi (Oleaceae) - the correct name for a widespread African species

    Friis, Ib, 1975, In : Kew Bulletin. 30, p. 16-16

    Research output: Contribution to journalJournal articleResearchpeer-review

  47. Published

    The giant species of Cirsium (Asteraceae) in S Ethiopia

    Friis, Ib, 1975, In : Norwegian Journal of Botany. 22, p. 201 - 207

    Research output: Contribution to journalJournal articleResearchpeer-review

  48. Published

    The two alternative systems of nomenclature proposed and used for orchids by Du Petit-Thouars

    Friis, Ib & Rasmussen, Finn N., 1975, In : Taxon. 24, p. 307-318

    Research output: Contribution to journalJournal articleResearchpeer-review

  49. Published

    Observation of nuclear magnetic order in solid 3He

    Halperin, W. P., Archie, C. N., Rasmussen, F. B., Buhrman, R. A. & Richardson, R. C., 1 Jan 1974, In : Physical Review Letters. 32, 17, p. 927-930 4 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  50. Published

    Dorstenia soerensenii sp. nov. (Moraceae) from SW Ethiopia, and related species

    Friis, Ib, 1974, In : Norwegian Journal of Botany. 21, p. 101-110

    Research output: Contribution to journalJournal articleResearchpeer-review

  51. Published

    Studies in the genus Haemanthus (Amaryllidaceae) III. A revision of the sections Gyaxis and Nerissa

    Friis, Ib & Bjørnstad, I., 1974, In : Norwegian Journal of Botany. 21, p. 243-275

    Research output: Contribution to journalJournal articleResearchpeer-review

  52. Published

    Studies in the genus Haemanthus (Amaryllidaceae) I. The infrageneric taxonomy

    Friis, Ib & Bjørnstad, I., 1972, In : Norwegian Journal of Botany. 19, p. 187-206

    Research output: Contribution to journalJournal articleResearchpeer-review

  53. Published

    Studies in the genus Haemanthus (Amaryllidaceae) II. A revision of the section Demeusea (De Wild. & Th. Dur.) Pax & Hoffm. emend Bjørnst. & Friis

    Friis, Ib & Bjørnstad, I., 1972, In : Norwegian Journal of Botany. 19, p. 207 — 222.

    Research output: Contribution to journalJournal articleResearchpeer-review

  54. Published

    Hall effect in the normal and flux-flow states of some indium alloys

    Byrnak, B. & Rasmussen, F. B., 1 Oct 1971, In : Physica B: Condensed Matter. 55, p. 357-361 5 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  55. Published

    A new species of Guizotia (Compositae) from NE tropical Africa

    Friis, Ib, 1971, In : Norwegian Journal of Botany. 18, p. 231-234

    Research output: Contribution to journalJournal articleResearchpeer-review

  56. Published

    A new species of Haemanthus (Amaryllidaceae) from SW Ethiopia

    Friis, Ib & Bjørnstad, I., 1971, In : Norwegian Journal of Botany. 18, p. 227-230

    Research output: Contribution to journalJournal articleResearchpeer-review

  57. Published

    A revision of the Stachys aculeolatus group (Labiateae) in tropical Africa

    Friis, Ib, Bjørnstad, I. & Thulin, M., 1971, In : Norwegian Journal of Botany. 18, p. 121-138

    Research output: Contribution to journalJournal articleResearchpeer-review

  58. Published

    Oversigt over Botanisk Haves Plantesamling

    Friis, Ib & Edlefsen, L. B., 1970, Københavns Universitets Fond til tilvejebringelse af læremidler. 101 p.

    Research output: Book/ReportBookEducation

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