TY  - JOUR
AU  - Gille, J. F.
TI  - An exponentiation theorem for unbounded derivations
JO  - Annales de l'institut Henri Poincaré. Section A, Physique Théorique
PY  - 1970
SP  - 215
EP  - 220
VL  - 13
IS  - 3
PB  - Gauthier-Villars
UR  - http://archive.numdam.org/item/AIHPA_1970__13_3_215_0/
UR  - https://zbmath.org/?q=an%3A0204.44401
UR  - https://www.ams.org/mathscinet-getitem?mr=279595
LA  - en
ID  - AIHPA_1970__13_3_215_0
ER  -