Salienko, I. A., O. O. Bogatyreva, S. E. Galchenko, and B. P. Sandomirsky. 2008. “Peptide Composition of Skin Extracts Depending on Its Physiological State”. Problems of Cryobiology and Cryomedicine 18 (4):445-47. https://journal.cryo.org.ua/index.php/probl-cryobiol-cryomed/article/view/348.