Gorbunov, L. V., and E. A. Gordienko. “Providing the Comparability Conditions of Results on Cryopreservation of Mammalian Embryos”. Problems of Cryobiology and Cryomedicine, vol. 21, no. 2, July 2011, pp. 162-7, http://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/141.