Kuznetsova, V. G., and G. F. Zhegunov. 2008. “Effect of Extracts from Chicken Embryonic Tissues on Mice With Experimental Leucopenia”. Problems of Cryobiology and Cryomedicine 18 (3):328-31. http://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/403.