1. S. N. Chernikov, ?Groups with given properties of systems of infinite subgroups,? Dokl. Akad. Nauk SSSR,171, 806?809 (1966).
2. S. N. Chernikov, ?Groups with given properties of systems of infinite subgroups,? Ukr. Mat. Zh.,19, No. 6, 111?131 (1967).
3. S. N. Chernikov, ?Investigation of groups with given properties of subgroups,? Ukr. Mat. Zh.,21, No. 2, 193?200 (1969).
4. S. N. Chernikov, ?Groups with invariant infinite Abelian subgroups,? in: Groups with Restrictions for Subgroups [in Russian], Naukova Dumka, Kiev (1971), pp. 47?65.
5. F. N. Liman, ?Groups with certain systems of invariant pd-subgroups,? in: Groups and Systems of Their Subgroups [in Russian], Inst. Mat. Akad. Nauk Ukr. SSR (1983), pp. 100?118.