Shilo, A. V., V. V. Lomako, and G. A. Babijchuk. 2005. “Change in Heart Activity of Rats under Artificial Hibernation”. Problems of Cryobiology and Cryomedicine 15 (3):509-10. https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1175.