1. S. N. Chernikov, ?Describing groups with subgroups having given properties,? Ukr. Mat. Zh.,21, No. 2, 193?200 (1969).
2. F. N. Liman, ?Groups in which all reducible subgroups are invariant,? ibid.,22, No. 6, 725?733 (1970).
3. F. N. Liman, ?Groups with some systems of invariant pd-subgroups,? in: Groups and Systems of Their Subgroups [in Russian], Inst. Mat. Akad. Nauk Ukr. SSR, Kiev (1983), pp. 100?118.
4. F. N. Liman, ?Periodic groups in which all Abelian noncyclic subgroups are invariant,? in: Groups with Restrictions on Subgroups [in Russian], Naukova Dumka, Kiev (1971), pp. 65?96.
5. F. N. Liman, ?On periodic groups in which all reducible pd-subgroups are normal,? in: The 9th All-Union Symposium on Group Theory. Proceedings [in Russian], Moscow (1984), pp. 33?34.