1. Adian, S. I., “The Burnside problem and identities in groups”, Nauka, Moscow, 1975 (Russian).
2. Deryabina, G. S.,On infinite p-groups with cyclic subgroups, Matem. Sbornik124 (1984), 495–504 (Russian).
3. Deryabina, G. S.,Defining relations of periodic groups, Ph.D. Thesis, Moscow State University, Moscow, 1985, 134pp. (Russian).
4. Ivanov, S.V.,Geometric method of study of groups with prescribed properties of subgroups, Ph.D. Thesis, Moscow State University, Moscow, 1988, 131pp. (Russian).
5. Lecture Notes of London Math. Soc.;S. V. Ivanov,1991