Puhovkin, A. Y., and K. I. Butskyi. “Spermatozoa Membrane Permeability in Sterlet (Acipenser Ruthenus L) and Carp (Cyprinus Carpio L)”. Problems of Cryobiology and Cryomedicine, vol. 24, no. 2, June 2014, p. 178, doi:10.15407/cryo24.02.178.