Akhalkatsi, M., Beridze, M. & Gvaladze, G. 1988: Embryo and endosperm development in Astragalus caucasicus Pall. -Bulletin of the Georgian National Academy of Sciences 132: 601-604. (in Georgian).
Arathi, H. S., Ganeshaiah, K. N., Uma-Shaanker, R. & Hegde, S. G. 1999: Seed abortion in Pongamia pinnata (Fabaceae). -American Journal of Botany 86(5): 659-662.
Ashrafunnisa, A. & Pullalah, T. 2000: Embryology of Clitoria ternatea (Fabaceae). -Plant Biosystems 134 (1): 39-43.
Bunge, A. 1868: Generis Astragali Species Gerontageae. -Mémoires de l'Académie Impériale des Sciences de Saint Pétersbourg ser. 7, 11(16): 1-140.
Cameron, B. G. & Prakash, N. 1994: Variation of the megagametophyte in the Papilionoideae. In: Ferguson IK, and Tucker S [eds.], Advances in Legume Systematics, 97-115, part 6. -Royal Botanical Gardens, Kew, England.
Galati, B., Rosenfeldt, S. & Tourn, G. 2006: Embryologyical studies in Lotus glaber (Fabaceae). -Annales Botanici Fennici 43: 97-106.
Gvaladze, G. & Akhalkatsi, M. 1996: Comparative embryology of some Astragalus species. -Bulletin of the Georgian National Academy of Sceiences 153: 432-434.
Johannson, M. & Walles, B. 1993: Functional anatomy of the ovule in broad bean (Vicia faba L.), I. Histogenesis prior to and after pollination. -International Journal of Plant Sciences 154: 80-89.
Johri, B. M. & Garg, S. 1959: Development of endosperm haustoria in some Leguminosae. -Phytomorphology. 9: 34-46.
Kazempour-Osaloo, S., Maassoumi, A. A. & Murakami, N. 2003: Molecular systematics of the genus Astragalus L. (Fabaceae): Phylogenetic analyses of nuclear ribosomal DNA internal transcribed spacers and chloroplast gene ndhF sequences. -Plant Systematics and Evolution 242: 1-32.
Kazempour-Osaloo, S., Maassoumi, A. A. & Murakami, N. 2005: Molecular systematics of the old world Astragalus (Fabaceae) as inferred from nr DNA ITS sequence data. -Brittonia 57(4): 367-381.
Lersten, N. R. 1983: Suspensors in Leguminosae. -Botanical Review 49: 233-257.
Liston, A. 1992: Variation in the chloroplast genes rpoC1 and rpoC2 of the genus Astragalus (Fabaceae): evidence from restriction site mapping of a PCR amplified fragment. -American Journal of Botany 79: 953-961.
Maassoumi, A. A. 1998: Astragalus in the old world: a Check-List. -Research Institute of Forests and Rangelands, Tehran.
Maheshwari, P. 1950: An Introduction to the Embryology of Angiosperms. -McGraw-Hill, New York.
Palser, B. F. 1975: The bases of angiosperm phylogeny: Embryology. -Annals of the Missouri Botanical Garden 62: 621-646.
Prakash, N. 1987: Embryology of the Leguminosae. In: Stirton CH (ed.), Advances in Legume Systematics, 241-278, Part 3. -Royal Botanical Gardens, Kew, England.
Podlech, D. 1982: Neue Aspekte zur Evolution und Gliederung der Gattung Astragalus L. (Leguminosae). -Mitt. Bot. Staatssamml. München 18: 359-378.
Rembert, D. H. 1969: Comparative megasporogenesis in Papilionaceae. -American Journal of Botany 56 (6): 584-591.
Riahi, M., Zarre, SH., Chehregani, A. & Behboudi, B. 2003: Seed development in two species of medifixed hairy Astragalus (Fabaceae). -Flora 198: 211-219.
Riahi, M. & Zarre, SH. 2009: Seed development in Astragalus cemerinus and A. ruscifolius (Fabaceae), and its systematic implications. -Acta Biologica Cracoviensia Series Botanica 51 (1): 111-117.
Sanderson, M. J. & Doyle, J. J. 1993: Phylogenetic relationships in North American Astragalus (Fabaceae) based on chloroplast DNA restriction site variation. -Systematic botany 18: 395-408.
Singh, V., Pande, P. C. & Jain, D. K. 2001: Embryology of Angiosperms. Part 4: 24-49. -Rastogi Publications, India.
Soverna, A. F., Galati, B. & Hoc, P. 2003: Study of ovule and megagametophyte development in four species of subtribe Phaseolinae (Leguminosae). -Acta Biologica Cracoviensia Series Botanica 45 (2): 63-73.
Wojciechowski, M. F., Sanderson, M. J. & Hu, J. M. 1999: Evidence on the monophyly of Astragalus (Fabaceae) and its major subgroups based on nuclear ribosomal DNA ITS and chloroplast DNA trnL intron data. -Systematic Botany 24: 409-437.
Zarre, SH. 2000: Systematic Revision of Astragalus L. sect. Adiaspastus, sect. Macrophyllium and sect. Pterophorus (Fabaceae). -Englera 18: 1-219.
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