TY  - BOOK
AU  - Helffer Bernard
AU  - Nier Francis
TI  - Hypoelliptic estimates and spectral theory for Fokker-Planck operators and Witten laplacians
SN  - 3-540-24200-7
U1  - 515.724 
PY  - 2005///
CY  - Berlin
PB  - Springer-Verlag
KW  - Operator theory
ER  -