Cherepanov, V. V. “Effect of Cryopreservation Factors on the Energetic Metabolism of Cyprinus Carpio L. Activated Spermatozoa”. Problems of Cryobiology and Cryomedicine, no. 4, Dec. 2003, pp. 58-65, http://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1079.