@article{GDZPPN002092980, title = {Root Systems and Elliptic Curves}, journal = {Inventiones mathematicae}, volume = {34}, year = {1976}, pages = {17-32}, zbl = {0358.17016}, url = {http://dml.mathdoc.fr/item/GDZPPN002092980} }
Looijenga, E. Root Systems and Elliptic Curves. Inventiones mathematicae, Tome 34 (1976) pp. 17-32. http://gdmltest.u-ga.fr/item/GDZPPN002092980/