1. S. N. Chernikov, “On the theory of infinite special p-groups,” Dokl. Akad. Nauk SSSR, 50, 71–74 (1945).
2. S. I. Adyan, The Burnside Problem and Identities in Groups [in Russian], Nauka, Moscow (1975).
3. A. Yu. Ol'shanskii, Geometry of Determining Relations in Groups [in Russian], Nauka, Moscow (1989).
4. V. I. Senashov, “Groups with condition of minimality for subgroups that are not almost layer-finite, ” Ukr. Mat. Zh., 43, No. 7–8, 1002–1008 (1991).
5. V. I. Senashov, “Sufficient conditions for almost layer-finiteness of a group,” Ukr. Mat. Zh., 51, No. 4, 472–485 (1999).