Shabunin, S. V., G. A. Vostroilova, and I. E. Shabanov. 2005. “Screening of Biologically Active Agents Depending on Technological Parameters of Cryogenic Fractionation of Placenta”. Problems of Cryobiology and Cryomedicine 15 (3):306-9. https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1115.