TY  - GEN
AU  - Rockland,Charles
TI  - Hypoellipticity and eigenvalue asymptotics
T2  - Lecture notes in mathematics ; 464
SN  - 038707175X
U1  - 510.8  515.353 
PY  - 1975///
CY  - Berlin, New York
PB  - Springer-Verlag
KW  - Differential equations, Partial
KW  - Differential equations, Hypoelliptic
KW  - Eigenvalues
KW  - Asymptotic expansions
N1  - Contine bibliogr
ER  -