Vedernikov V. A.
Ukr. Mat. Zh. - 2002. - 54, № 7. - pp. 897-906
We construct an infinite set of new types of ω-fibered Fitting classes of finite groups that differ from ω-local classes. We also describe the structure of maximal inner ω-satellites for the main types and establish a relationship between ω-fibered and Ω-foliated Fitting classes.
Ukr. Mat. Zh. - 2001. - 53, № 5. - pp. 579-588
We present a solution of the Shemetkov problem (on the investigation of critical formations) for piecewise-compositional hereditary formations.