@article{1256053182, author = {Schenkman, Eugene}, title = {The number of Hall $\pi$-subgroups of a finite group}, journal = {Illinois J. Math.}, volume = {14}, number = {4}, year = {1970}, pages = { 241-243}, language = {en}, url = {http://dml.mathdoc.fr/item/1256053182} }
Schenkman, Eugene. The number of Hall $\pi$-subgroups of a finite group. Illinois J. Math., Tome 14 (1970) no. 4, pp. 241-243. http://gdmltest.u-ga.fr/item/1256053182/