Babijchuk, V. G. “Comparative Characteristics of Cardiac Rate in Rats When Applying Different Methods of Cold Effects”. Problems of Cryobiology and Cryomedicine, vol. 17, no. 3, Oct. 2007, pp. 229-36, http://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/493.