@article{GDZPPN00240284X, title = {A Characterization of the Mathieu Group M11.}, journal = {Mathematische Zeitschrift}, volume = {105}, year = {1968}, pages = {162-166}, zbl = {0164.33101}, url = {http://dml.mathdoc.fr/item/GDZPPN00240284X} }
Norman, Christopher W. A Characterization of the Mathieu Group M11.. Mathematische Zeitschrift, Tome 105 (1968) pp. 162-166. http://gdmltest.u-ga.fr/item/GDZPPN00240284X/