TY  - BOOK
AU  - Rockland,Charles
TI  - Hypoellipticity and eigenvalue asymptotics
SN  - 038707175X :
U1  -  510.82 
PY  - 1975///
CY  - Berlin
PB  - Springer-Verlag
KW  - Asymptotic expansions
KW  - Differential equations, Hypoelliptic
KW  - Differential equations, Partial
KW  - Eigenvalues
ER  -