Shkodovskaya, N. Y. “Effect of Newborn Piglet Skin Extract on Regeneration Processes in Skin After Experimental Cold Damages”. Problems of Cryobiology and Cryomedicine, vol. 15, no. 4, Dec. 2005, p. 730, http://journal.cryo.org.ua/index.php/probl-cryobiol-cryomed/article/view/1237.