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@article{EXMA_2004__13_3_52775, author = {Chua, Kok Seng and Lang, Mong Lung}, title = {Congruence subgroups associated to the {Monster.}}, journal = {Experimental mathematics}, pages = {343--360}, publisher = {mathdoc}, volume = {13}, number = {3}, year = {2004}, zbl = {1099.11021}, language = {en}, url = {http://geodesic.mathdoc.fr/item/EXMA_2004__13_3_52775/} }
Chua, Kok Seng; Lang, Mong Lung. Congruence subgroups associated to the Monster.. Experimental mathematics, Tome 13 (2004) no. 3, pp. 343-360. http://geodesic.mathdoc.fr/item/EXMA_2004__13_3_52775/