V. I. Babenko, V. I. Grischenko, and A. V. Dunayevskaya, “About High Rates of Biological Objects’ Freezing and Cooling in Cylindrical Containers When Immersing Them Into Liquid Nitrogen”, Probl Cryobiol Cryomed, vol. 15, no. 2, pp. 129–136, Jun. 2006.