Grischenko, V. I., V. V. Lazurenko, O. S. Prokopyuk, and O. N. Aralov. 2003. “Usage of Cryopreserved Placental Tissue When Treating Pregnancy Failure”. Problems of Cryobiology and Cryomedicine, no. 1 (May):76-80. http://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1014.