Grischenko, V. I., N. N. Chub, L. G. Demina, and P. Todorov. 2005. “Effect of Sub-Zero Temperatures on Morphofunctional Integrity of Human Ovarian Tissue”. Problems of Cryobiology and Cryomedicine 15 (3):250. https://journal.cryo.org.ua/index.php/probl-cryobiol-cryomed/article/view/1095.