Gorbunov, L. V., and A. S. Salina. “Assessment of Technology Efficiency for Mammalian Oocyte and Embryo Cryopreservation”. Problems of Cryobiology and Cryomedicine, vol. 15, no. 3, Sept. 2005, pp. 255-62, https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1097.