Alm, T. & Birks, H.H. 1991. Late Weichselian flora and vegetation of Andøya, Northern Norway - macrofossil (seed and fruit) evidence from Nedre Æråsvatn. - Nord. J. Bot. 11: 465-476.
Al-Shehbaz, I.A. 1987. The genera of Alysseae (Cruciferae; Brassicaceae) in the southeastem United States. - J. Arnold Arbor. 68: 185-240.10.5962/bhl.part.11932
Avetisjan, V.E. 1979. The role of high mountain areas of the Caucasus in speciation of Draba L. and some aspects of the genesis of the genus. - Problemy Botaniki 14: 59-62. (In Russian).
Bayer, R.J., Purdy, B.G. & Lebedyk, D.G. 1991. Niche differentiation among eight sexual species of Antennaria Gaertner (Asteraceae: Inuleae) and A. rosea, their allopolyploid derivative. - Evol. Trends Plants 5: 109-123.
Bierzychudek, P. 1987. Patterns in plant parthenogenesis. - In: Steams, S. C. (ed.), The evolution of sex and its consequences, Birkhäuser, Basel, pp. 197-217.
Bierzychudek, P. 1989. Environmental sensitivity of sexual and apomictic Antennaria: do apomicts have general-purpose genotypes? - Evolution 43: 1456-1466.10.1111/j.1558-5646.1989.tb02596.x28564238
Bierzychudek, P. 1990. The demographic consequences of sexuality and apomixis in Antennaria. - In: Kawano, S. (ed.), Biological approaches and evolutionary trends in plants, Academic Press, London, pp. 293-307.
Böcher, T.W. 1966. Experimental and cytological studies on plant species. IX. Some Arctic and montane Crucifers. - Biol. Skr. Dan. Vid. Selsk. 14(7): 1-74.
Bothmer, R. von Flink, J., Jacobsen, N., Kotimäki, M. & Landström, T. 1983. Interspecific hybridization with cultivated barley (Hordeum vulgare L.). - Hereditas 99: 219-244.10.1111/j.1601-5223.1983.tb00895.x6668209
Bothmer, R. von Flink, J. & Landström, T. 1988. Meiosis in interspecific Hordeum hybrids. IV. Tetraploid (4x x 4x) hybrids. - Genome 30: 479-485.10.1139/g88-080
Bothmer, R. von Flink, J., Landström, T. & Thomas, H.M. 1989. Meiosis in interspecific Hordeum hybrids. V. Pentaploid hybrids. - Hereditas 110: 217-226.10.1111/j.1601-5223.1989.tb00784.x
Bretten, S. 1990. Draba oxycarpa Sommerf. - In: Gjrerevoll, O., Maps of distribution of Norwegian vascular plants. Vol. II. Alpine plants, Tapir Publ., Trondheim, p. 61.
Clausen, J., Keck, D.D. & Hiesey, W.M. 1945. Experimental studies on the nature of species. II. Plant evolution through amphiploidy and autoploidy with examples from the Madiinae. - Carnegie Inst. Washington Publ. 564: 22-45.
den Nijs, J.C.M. & Hulst, A. van der 1988. Cytogeography of Taraxacum section Erythrosperma: Diploid sexuals in SE and SW Europe. - Bot. Jahrb. Syst. 110: 83-93.
den Nijs, J.C.M. & Hulst, A. van der & Sterk, A.A. 1980. Cytogeographical studies of Taraxacum sect. Taraxacum (= sect. Vulgaria) in central Europe. - Bot. Jahrb. Syst. 101: 527-554.
den Nijs, J.C.M. & Hulst, A. van der & Sterk, A.A. 1984. Cytogeography and cytotaxonomy of some Taraxacum sections in Belgium and northern France. - Acta bot. neerl. 33: 431-455.10.1111/j.1438-8677.1984.tb01836.x
den Nijs, J.C.M. & Hulst, A. van der Sorgdrager, K. & Stoop, J. 1985. Biosystematic studies of the Rumex acetosella complex. IX. Cytogeography of the complex in the Iberian Peninsula and taxonomic discussion. - Bot. Helv. 95: 141-156.
Doyle, J.J., Doyle, J.L., Brown, A.H.D. & Grace, J.P. 1990. Multiple origins of polyploids in the Glycine tabacina complex inferred from chloroplast DNA polymorphism. - Proc. Natl. Acad. Sci. USA 87: 714-717.10.1073/pnas.87.2.7145333611607059
Ehrendorfer, F. 1959. Differentiation-hybridization cycles and polyploidy in Achillea. - Cold Spring Harbor Symp. Quant. Biol. 24: 141-152.10.1101/SQB.1959.024.01.014
Ekman, E. 1931. Contribution to the Draba flora of Greenland. III. Some notes on the arctic, especially the Greenland Drabas of the sections Aizopsis and Chrysodraba DC. - Svensk Bot. Tidskr. 25: 465-494.
Ekman, E. 1936. The Drabas of the Fifth Thule Expedition under the leadership of Dr. Knud Rasmussen. - In: Report of the Fifth Thule Expedition 1921-24, vol. 2, Gyldendal, Copenhagen, pp. 85-93.
Goldblatt, P. 1980. Polyploidy in angiosperms: monocotyledons. - In: Lewis, W.H. (ed.), Polyploidy. Biological relevance, Plenum Press, New York, pp. 219-239.
Hamrick, J.L., 1989. Isozymes and the analysis of genetic structure in plant populations. - In: Soltis, D.E. & Soltis, P.S. (eds.), Isozymes in Plant Biology, Dioscorides Press, Portland, pp. 87-105.10.1007/978-94-009-1840-5_5
Hamrick, J.L., Linhart, Y.B. & Mitton, J.B. 1979. Relationships between life history characteristics and electrophoretically detectable genetic variation in plants. - Ann. Rev. Ecol. Syst. 10: 173-200.10.1146/annurev.es.10.110179.001133
Lande, R. & Schemske, D.W. 1985. The evolution of self-fertilization and inbreeding depression in plants. I. Genetic models. - Evolution 39: 24-40.10.1111/j.1558-5646.1985.tb04077.x28563655
Lord, R.M. & Richards, A.J. 1977. A hybrid swarm between the diploid Dactylorhiza fuchsii (Druce) Soó and the tetraploid D. purpurella (T. & T.A. Steph.) Soó in Durham. -Watsonia 11: 205-210.
Lumaret, R. & Barrientos, E. 1990. Phylogenetic relationships and gene flow between sympatric diploid and tetraploid plants of Dactylis glomerata (Gramineae). - Pl. Syst. Evol. 169: 81-96.10.1007/BF00935987
Mulligan, G.A. 1971a. Cytotaxonomic studies of Draba species of Canada and Alaska: D. ventosa, D. ruaxes, and D. paysonii. - Canad. J. Bot. 49: 1455-1460.10.1139/b71-204
Mulligan, G.A. 1971b. Cytotaxonomic studies of the closely allied Draba cana, D. cinerea, and D. groenlandica in Canada and Alaska. - Canad. J. Bot. 49: 89-93.
Mulligan, G.A. 1972. Cytotaxonomic studies of Draba species in Canada and Alaska: D. oligosperma and D. incerta. - Canad. J. Bot. 50: 1763-1766.10.1139/b72-218
Mulligan, G.A. 1974a. Confusion in the names of three Draba species of the arctic: D. adamsii, D. oblongata, and D. corymbosa. - Canad. J. Bot. 52: 791-793.10.1139/b74-102
Ranker, T.A., Haufler, C.H., Soltis, P.S. & Soltis, D.E. 1989. Genetic evidence for allopolyploidy in the Neotropical fem Hemionitis pinnatifida (Adiantaceae) and the reconstruction of an ancestral genome. - Syst. Bot. 14: 439-447.10.2307/2418989
Seidenfaden, G. & Sørensen, T. 1937. The vascular plants of Northeast Greenland from 74°30’ to 79°00’ N. lat. and a summary of all species found in East Greenland. -Meddel. Grønland 101(4): 1-215.
Soltis, D.E. & Soltis, P.S. & Soltis, P.S. 1990. Chloroplast DNA and nuclear rDNA variation: insights into autopolyploid and allopolyploid evolution. - In: Kawano, S. (ed.), Biological approaches and evolutionary trends in plants, Academic Press, London, pp. 97-117.
Soltis, P.S., Doyle, J.J. & Soltis, D.E. 1991. Molecular data and polyploid evolution in plants. - In: Soltis, P.S., Soltis, D.E. & Doyle, J.J. (eds.), Molecular systematics of plants, Chapman and Hall, New York, pp. 177-201.
Stebbins, G.L. 1980. Polyploidy in plants: unsolved problems and prospects. - In: Lewis, W.H. (ed.), Polyploidy. Biological relevance, Plenum Press, New York, pp. 495-520.
Tolmachev, A.I. 1939. Draba L. - In: Komarov, V.L. (ed.), Flora S.S.S.R. Vol. 8. [English translation 1970 by Lavoott, R., Israel Program for Scientific Translations, Jerusalem, pp. 276-337, 486-487].
Wyatt, R., Odrzykoski, I.J. & Stoneburner, A. 1988. Allopolyploidy in bryophytes: recurring origins of Plagiomnium medium. - Proc. Natl. Acad. Sci. USA 85: 5601-5604.10.1073/pnas.85.15.560128180716593968