Martynyuk, V., N. I. Karpenko, & O. M. Tsarenko. " Micromorphological features of pollen grains, seeds and leaf surfaces of Atocion hypanicum (Klok.) Tzvel. and A. compactum (Fisch.) Tzvel.." Modern Phytomorphology [Online], 7 (2015): 95-101. Web. 12 Apr. 2018