TY  - JOUR
AU  - Ilie Corvei
TI  - The cosine functional equation for nilpotent groups.
JO  - Aequationes mathematicae
PY  - 1977
SP  - 99
EP  - 106
VL  - 15
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1977__15_136633/
ID  - AM2_1977__15_136633
ER  -