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@article{MZ_1968__106_171014, author = {Christopher W. Norman}, title = {A {Characterization} of the {Mathieu} {Group} {M11.}}, journal = {Mathematische Zeitschrift}, pages = {162--166}, publisher = {mathdoc}, volume = {106}, year = {1968}, zbl = {0164.33101}, url = {http://geodesic.mathdoc.fr/item/MZ_1968__106_171014/} }
Christopher W. Norman. A Characterization of the Mathieu Group M11.. Mathematische Zeitschrift, Tome 106 (1968), pp. 162-166. http://geodesic.mathdoc.fr/item/MZ_1968__106_171014/