Research areas

  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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

  21. 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

  22. 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

  23. 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

  24. 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

  25. 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

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