TY  - DATA
AU  - Ponge, Raphael
TI  - Heisenberg calculus and spectral theory of hypoelliptic operators on Heisenberg manifolds 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9781470405120 (online)
PY  - 2008///
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0906
ER  -