Babijchuk, V. G. “Ultrastructural Re-Arrangements of Myocardium of Young and Aged Rats After Extreme Cryotherapy”. Problems of Cryobiology and Cryomedicine, vol. 16, no. 3, Sept. 2006, pp. 292-0, http://journal.cryo.org.ua/index.php/probl-cryobiol-cryomed/article/view/585.