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@article{MAN_1976__222_162860, author = {A.G. van Asch}, title = {Modular {Forms} and {Root} {Systems.}}, journal = {Mathematische Annalen}, pages = {145--170}, publisher = {mathdoc}, volume = {222}, year = {1976}, zbl = {0329.10017}, url = {http://geodesic.mathdoc.fr/item/MAN_1976__222_162860/} }
A.G. van Asch. Modular Forms and Root Systems.. Mathematische Annalen, Tome 222 (1976), pp. 145-170. http://geodesic.mathdoc.fr/item/MAN_1976__222_162860/