Katsen-Globa, A., J. C. Schulz, J. S. Baunach, F. Ehrhart, Y.-J. Oh, U. Schön, O. Kofanova, A. J. Beier, S. Wiedemeier, J. Metze, S. Shirley, D. Spitkovsky, A. Sachinidis, J. Hescheler, and H. Zimmermann. “Towards a Medically Approved Technology for Large-Scale Stem Cell Banks: Tools and Methods”. Problems of Cryobiology and Cryomedicine, vol. 18, no. 4, Dec. 2008, pp. 468-7, https://journal.cryo.org.ua/index.php/probl-cryobiol-cryomed/article/view/355.