@article{GDZPPN002093537,
title = {Biinvariant Operators on Nilpotent Lie Groups.},
journal = {Inventiones mathematicae},
volume = {41},
year = {1977},
pages = {259-264},
zbl = {0373.58009},
url = {http://dml.mathdoc.fr/item/GDZPPN002093537}
}
Wigner, David. Biinvariant Operators on Nilpotent Lie Groups.. Inventiones mathematicae, Tome 41 (1977) pp. 259-264. http://gdmltest.u-ga.fr/item/GDZPPN002093537/