Yakovleva, E. A. “Study of Some Biophysical Parameters of Human Follicular Fluid Prior to and After Exposure to Low Temperatures”. Problems of Cryobiology and Cryomedicine, vol. 15, no. 3, Sept. 2005, p. 473, http://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1164.