Ventskovska, O. A., O. V. Shylo, and G. A. Babiychuk. “Sleep After Rhythmic Cold Effects”. Problems of Cryobiology and Cryomedicine, vol. 21, no. 1, Feb. 2011, pp. 10-21, https://journal.cryo.org.ua/index.php/probl-cryobiol-cryomed/article/view/150.