Petrenko, Yu. A., N. A. Gorokhova, and A. Yu. Petrenko. 2005. “Effect of High-Molecular Compounds on Viability and Functional Activity of Human Embryonic Liver Cells Prior to and After Cryopreservation”. Problems of Cryobiology and Cryomedicine 15 (3):375-79. https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1136.