Cherkashina, I. V., and I. N. Kuchkov. 2008. “Application of Perfluorinated Carbohydrates for Low Temperature Storage of Human Spermatozoa”. Problems of Cryobiology and Cryomedicine 18 (4):515-19. http://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/366.