Parfenova, V. V., T. F. Petrenko, N. A. Volkova, and E. I. Goncharuk. “Cryopreservation of Human Embryonic Fibroblast Culture”. Problems of Cryobiology and Cryomedicine 15, no. 4 (December 25, 2005): 746. Accessed May 2, 2024. http://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1267.