TY  - BOOK
AU  - Helffer, Bernard
AU  - Nier, Francis
TI  - Hypoelliptic estimates and spectral theory for Fokker-Plank operators and witten Laplacians
SN  - 3-540-24200-7
U1  - 517.984 
PY  - 2005///
CY  - Germany
PB  - Springer-Verlag
KW  - Hypoelliptic operators
KW  - Spectral theory- Mathematics
ER  -