Todrin, A. F., N. N. Chub, O. V. Lipina, V. V. Chekanova, E. E. Nipot, V. I. Pinyaev, P. Todorov, and O. A. Gorobchenko. 2008. “Biophysical Characteristics of Human Follicular Fluid Prior To and After Low Temperature Preservation”. Problems of Cryobiology and Cryomedicine 18 (4):420-22. https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/343.