%0 Journal Article
%A Beidleman, James C.
%T Formations and $\pi $-closure in finite groups
%J Compositio Mathematica
%D 1971
%P 347-356
%V 23
%N 3
%I Wolters-Noordhoff Publishing
%U http://www.numdam.org/item/CM_1971__23_3_347_0/
%G en
%F CM_1971__23_3_347_0