Ivanov, I. V.; Groza, N. V.; Mnasina, E. E.; Myagkova, G. I. Russian Journal of Bioorganic Chemistry, 1995 , vol. 21, # 10 p. 696 - 699 Bioorganicheskaya Khimiya, 1995 , vol. 21, # 10 p. 802 - 805