Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{AM2_1977__15_136633, author = {Ilie Corvei}, title = {The cosine functional equation for nilpotent groups.}, journal = {Aequationes mathematicae}, pages = {99--106}, publisher = {mathdoc}, volume = {15}, year = {1977}, zbl = {0348.39004}, url = {http://geodesic.mathdoc.fr/item/AM2_1977__15_136633/} }
Ilie Corvei. The cosine functional equation for nilpotent groups.. Aequationes mathematicae, Tome 15 (1977), pp. 99-106. http://geodesic.mathdoc.fr/item/AM2_1977__15_136633/