Ryazantsev, V. V., L. A. Babijchuk, O. L. Zubova, and T. M. Gurina. “Cord Blood Cryopreservation With PEO-1500”. Problems of Cryobiology and Cryomedicine, vol. 17, no. 3, Oct. 2007, pp. 256-62, https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/497.