@article{01103009, title = {Computing periods of cusp forms and modular elliptic curves.}, journal = {Experimental Mathematics}, volume = {6}, year = {1997}, pages = {97-107}, doi = {10.1080/10586458.1997.10504599}, zbl = {0894.11027}, language = {en}, url = {http://dml.mathdoc.fr/item/01103009} }
Cremona, John E. Computing periods of cusp forms and modular elliptic curves.. Experimental Mathematics, Tome 6 (1997) pp. 97-107. doi : 10.1080/10586458.1997.10504599. http://gdmltest.u-ga.fr/item/01103009/