@article{GDZPPN002394294, title = {A characterization of the Mathieu group M12.}, journal = {Mathematische Zeitschrift}, volume = {85}, year = {1964}, pages = {378-388}, zbl = {0129.01801}, url = {http://dml.mathdoc.fr/item/GDZPPN002394294} }
Wong, W.J. A characterization of the Mathieu group M12.. Mathematische Zeitschrift, Tome 85 (1964) pp. 378-388. http://gdmltest.u-ga.fr/item/GDZPPN002394294/