@article{GDZPPN002396750, title = {The permutability of orthogonal subnormal subgroups.}, journal = {Mathematische Zeitschrift}, volume = {87}, year = {1965}, pages = {365-372}, zbl = {0131.02203}, url = {http://dml.mathdoc.fr/item/GDZPPN002396750} }
Roseblade, James E. The permutability of orthogonal subnormal subgroups.. Mathematische Zeitschrift, Tome 87 (1965) pp. 365-372. http://gdmltest.u-ga.fr/item/GDZPPN002396750/