Bagheri, A. 2009: Taxonomical study of the genus Astragalus (Fabaceae) in the Zanjan rovince, Iran; M. Sc. dissertation, Tarbiat Moallem University, Tehran. (Unpublished, in Persian).
Bunge, A. 1868. Generis Astragali Species Gerontogeae pars prior, clave diagnosticae. -Mem. Acad. Imp. Sci. S. Petersburg, ser. 7, 11 (16): 1-160.
Bunge, A. 1869: Generis Astragali Species Gerontogeae, pars altera, speciorum enumeratio. -Mem. Acad. Imp. Sci. S. Petersburg 15 (1): 1-245.
Fischer, F. B., 1853: Synopsis Astragalarum Tragacantharum. -Bull. Soc. Imp. Nat. Mosco 26 (2): 314-486.
Ghahremaninejad, F. 1992a: A revision on the sect. HymenostegisBunge of the genus Astragalus (Fabaceae) M. Sc. dissertation, Tarbiat Moallem University, Tehran. (Unpublished, in Persian).
Ghahremaninejad, F. 1992b: A new species of the genus Astragalus, sect. Hymenostegis from N.W. – Iran. -Iranian Journal of Botany 5 (2): 105-109.
Ghahremaninejad, F. & Podlech, D. 2005: Astragalus assadabadensis (Fabaceae), a new species from Iran. - Ann. Bot. Fennici. 42 (3): 207-209.
Kazempour Osaloo, S., Maassoumi, A. A. & Murakami, N. 2003: Molecular systematic of the genus Astragalus L. (Fabaceae): Phylogenetic analyses of nuclear ribosomal DNA internal transcribed spacers and chloroplast gene ndhF sequences. -Plant Syst. Evol. 242: 1-32.
Kazemi, M., Kazempour Osaloo, S., Maassoumi, A. A. & Rastegar Pouyani, E. 2009: Molecular phylogeny of selected Old World Astragalus (Fabaceae): incongruence among chloroplast trnL-F, ndhF and nuclear ribosomal DNA ITS sequences. -Nordic Journal of Botany 27: 425–436.
Maassoumi, A. A. & Ghahremaninejad, F. 1999: Interesting new species of Astragalus sect. Hymenostegis in Iran. -Iranian Journal of Botany 8 (1): 35-41.
Maassoumi, A. A. 1995: The genus Astragalus in Iran, perennials, vol. 3. Research Institute of Forests & Rangelands, Tehran.
Podlech, D. & Maassoumi, A. A. 2001: Astragalus sect. Hymenostegis in K. H. Rechinger Flora Iranica 175: 127-183. –Academische verlag Salzburg.
Podlech, D. 1990: Die Typifizierung der altweltlichen sektionen der gattung Astragalus L. (Legumonosae). -Mitt. Bot. Stataaml. Munchen 29: 478 (1990).
Podlech, D. 2004: New species of AstragalusL. (Leguminosae), mainly from Iran. -Ann. Naturhist. Mus. Wien 105 ß 565 – 596.
Podlech, D., Zarre, Sh. & Maassoumi, A. A., 2001: Papilionaceae IV: Astragaleae: Astragalus II. in Rechinger, K. H. (ed.): Flora Iranica, Lfg. 175. - Graz: Akademische Druck- und Verlagsanstalt.
Rechinger, K. H., Dulfer, H. & Patzak, A. 1959: Širjaevii fragmenta Astragalogica V-Vii. sect. Hymenostegis. -Österr. Akad. Wiss., Math.-Naturwiss. Kl., Abt. 1, Biol. 168 (2): 7-115.
Ranjbar, M. 2010: Taxonomic notes on the genus Astragalus(Fabaceae) in Iran, with the description of a new species. -Phytotaxa 7: 46–51.
Zarre, Sh. & Podlech, D. 1996: Taxonomic revision of Astragalus L. sect. Hymenostegis Bunge (Leguminosae). -Sendtnera, vol. 3: 255-312.