Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1980__247_163351, author = {Palle E.T. Jorgensen}, title = {Partial {Differential} {Operators} and {Discrete} {Subgroups} of a {Lie} {Group.}}, journal = {Mathematische Annalen}, pages = {101--110}, publisher = {mathdoc}, volume = {247}, year = {1980}, zbl = {0433.22010}, url = {http://geodesic.mathdoc.fr/item/MAN_1980__247_163351/} }
Palle E.T. Jorgensen. Partial Differential Operators and Discrete Subgroups of a Lie Group.. Mathematische Annalen, Tome 247 (1980), pp. 101-110. http://geodesic.mathdoc.fr/item/MAN_1980__247_163351/