Ostankov, M. V. “Theoretical Analysis of the Efficiency of Linear and Two-Step Freezing Regimens for Mammalian Embryo Cryopreservation”. Biophysical Bulletin, Vol. 1, no. 20, Sept. 2008, pp. 73-78, https://periodicals.karazin.ua/biophysvisnyk/article/view/1583.