[1]
V. Y. Chadaev, I. N. Kuchkov, I. V. Cherkashina, K. A. Goltsev, and I. V. Dobrunova, “Morphological and functional characteristics of human spermatozoa after cryopreservation under ultrarapid cooling”, Probl Cryobiol Cryomed, vol. 15, no. 4, pp. 665–670, Dec. 2005.