@article{01103014, title = {Hecke eigenforms in the cohomology of congruence subgroups of }, journal = {Experimental Mathematics}, volume = {6}, year = {1997}, pages = {163-174}, doi = {10.1080/10586458.1997.10504604}, zbl = {1088.11037}, language = {en}, url = {http://dml.mathdoc.fr/item/01103014} }
van Geemen, Bert; van der Kallen, Wilberd; Top, Jaap; Verberkmoes, Alain. Hecke eigenforms in the cohomology of congruence subgroups of . Experimental Mathematics, Tome 6 (1997) pp. 163-174. doi : 10.1080/10586458.1997.10504604. http://gdmltest.u-ga.fr/item/01103014/