Petrushko, M. P., V. I. Pinyayev, and N. N. Erogova. “Assessment of Chromatin State in Blastomeres After Cryopreservation”. Problems of Cryobiology and Cryomedicine, vol. 15, no. 3, Sept. 2005, p. 248, https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1093.