Pavlenko-Barysheva, Valery.
" The fruit ultrastructure of the species from sections Praealtina (Gremli) Schljak. and Echinina (Näeg. et Peter) Schljak of the genus Pilosella Vaill. in Crimean flora." <em>Modern Phytomorphology</em> [Online], 6 (2014): 263-267. Web. 12 Apr. 2018