@article{1102985571, author = {Spencer, Armond E.}, title = {Maximal nonnormal chains in finite groups.}, journal = {Pacific J. Math.}, volume = {27}, number = {3}, year = {1968}, pages = { 167-173}, language = {en}, url = {http://dml.mathdoc.fr/item/1102985571} }
Spencer, Armond E. Maximal nonnormal chains in finite groups.. Pacific J. Math., Tome 27 (1968) no. 3, pp. 167-173. http://gdmltest.u-ga.fr/item/1102985571/