TY  - JOUR
AU  - Beidleman, James C.
TI  - Formations and $\pi $-closure in finite groups
JO  - Compositio Mathematica
PY  - 1971
SP  - 347
EP  - 356
VL  - 23
IS  - 3
PB  - Wolters-Noordhoff Publishing
UR  - http://www.numdam.org/item/CM_1971__23_3_347_0/
LA  - en
ID  - CM_1971__23_3_347_0
ER  -