TY  - JOUR
AU  - Chua, Kok Seng
AU  - Lang, Mong Lung
TI  - Congruence subgroups associated to the Monster.
JO  - Experimental mathematics
PY  - 2004
SP  - 343
EP  - 360
VL  - 13
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/EXMA_2004__13_3_52775/
LA  - en
ID  - EXMA_2004__13_3_52775
ER  -