Pavlenko, B. M. “Effect of Convector Freezing on Sperm Survival and Fertilizing Ability After Thawing”. Problems of Cryobiology and Cryomedicine, vol. 17, no. 2, June 2007, pp. 173-8, https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/518.