Pavlenko, B. M. “Study of Effect of Concentrated Cryoprotective Medium on Survival and Fertilizing Ability of Frozen-Thawed Bovine Sperm”. Problems of Cryobiology and Cryomedicine, vol. 17, no. 3, Oct. 2007, pp. 263-71, https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/501.