@article{GDZPPN002307820, title = {Solvable Normal Subgroups and Nilpotent Ideals in Matrix Rings.}, journal = {Mathematische Annalen}, volume = {201}, year = {1973}, pages = {251-264}, zbl = {0249.16012}, url = {http://dml.mathdoc.fr/item/GDZPPN002307820} }
Lanski, Charles. Solvable Normal Subgroups and Nilpotent Ideals in Matrix Rings.. Mathematische Annalen, Tome 201 (1973) pp. 251-264. http://gdmltest.u-ga.fr/item/GDZPPN002307820/