Anan’ina, A.E., Tsutsayeva, A.A., Balyberdina, L.M., Stepanyuk, L.V. and Chernyshenko, L.G. 2005. Experience of long-term storage of industrial microorganisms and higher fungi in liquid nitrogen. Problems of Cryobiology and Cryomedicine. 15, 3 (Sep. 2005), 290–291.