Lavrik, O. A., B. T. Stegniy, V. S. Bilokin, and G. V. Trifonova. “Way to Purify the Bovine Blood Serum from γ-Globulin and Its Use in Cell Culture Biotechnology”. Problems of Cryobiology and Cryomedicine, vol. 15, no. 3, Sept. 2005, p. 538, https://journal.cryo.org.ua/index.php/probl-cryobiol-cryomed/article/view/1187.