Terziiski D., Cheshmedziev, Il.. 1994. Scaning Electronmicroscopic investigation of Spermoderm of Allium, Nectaroscordum and Ipheion Species.
Annuaire de L'Universite de Sofia "ST.Kl.Ohridski", Livre 2 – Botanique, Tome 85, 95-101.
Abstract:Investigations were made on the ultrastructural organization of the outer spermoderm surface of 13 species from the genera Allium (11), Nectaroscordum (1) and Ipheion (1), common i Bulgaria. Sculptural types and their distribution by species and superspecific categories were established, and discussion was made on their taxonomic significance.