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@article{MZ_1963__82_170187, author = {Chih-Han Sah}, title = {On the normality of {Hall} subgroups in finite groups.}, journal = {Mathematische Zeitschrift}, pages = {243--246}, publisher = {mathdoc}, volume = {82}, year = {1963}, zbl = {0118.26703}, url = {http://geodesic.mathdoc.fr/item/MZ_1963__82_170187/} }
Chih-Han Sah. On the normality of Hall subgroups in finite groups.. Mathematische Zeitschrift, Tome 82 (1963), pp. 243-246. http://geodesic.mathdoc.fr/item/MZ_1963__82_170187/