@article{GDZPPN002404613, title = {A Characterisation of Solvable Groups.}, journal = {Mathematische Zeitschrift}, volume = {111}, year = {1969}, pages = {213-217}, zbl = {0174.30806}, url = {http://dml.mathdoc.fr/item/GDZPPN002404613} }
Dress, Andreas. A Characterisation of Solvable Groups.. Mathematische Zeitschrift, Tome 111 (1969) pp. 213-217. http://gdmltest.u-ga.fr/item/GDZPPN002404613/