Petrenko, Y. A., N. A. Gorokhova, and A. Y. Petrenko. “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, vol. 15, no. 3, Sept. 2005, pp. 375-9, https://journal.cryo.org.ua/index.php/probl-cryobiol-cryomed/article/view/1136.