Katkov, I. I. “Novel Approaches to Cryopreservation and Long Term Stabilization of Progenitor Cells”. Problems of Cryobiology and Cryomedicine, vol. 15, no. 3, Sept. 2005, pp. 410-7, https://journal.cryo.org.ua/index.php/probl-cryobiol-cryomed/article/view/1145.