@article{MZ_1965__90_170492,
     author = {James E. Roseblade},
     title = {The permutability of orthogonal subnormal subgroups.},
     journal = {Mathematische Zeitschrift},
     pages = {365--372},
     publisher = {mathdoc},
     volume = {90},
     year = {1965},
     zbl = {0131.02203},
     url = {http://geodesic.mathdoc.fr/item/MZ_1965__90_170492/}
}