@article{MZ_1964__84_170275,
     author = {W.J. Wong},
     title = {A characterization of the {Mathieu} group {M12.}},
     journal = {Mathematische Zeitschrift},
     pages = {378--388},
     publisher = {mathdoc},
     volume = {84},
     year = {1964},
     zbl = {0129.01801},
     url = {http://geodesic.mathdoc.fr/item/MZ_1964__84_170275/}
}