@article{GDZPPN002414325, title = {Joins of Subnormal Subgroups are Serial.}, journal = {Mathematische Zeitschrift}, volume = {136}, year = {1974}, pages = {129-130}, zbl = {0284.20032}, url = {http://dml.mathdoc.fr/item/GDZPPN002414325} }
Hickin, Kenneth K.; Phillips, Richard E. Joins of Subnormal Subgroups are Serial.. Mathematische Zeitschrift, Tome 136 (1974) pp. 129-130. http://gdmltest.u-ga.fr/item/GDZPPN002414325/