TY  - DATA
AU  - Everitt, W. N.
AU  - Markus, L.
TI  - Elliptic partial differential operators and symplectic algebra 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9781470403683 (online)
PY  - 2003///
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0770
ER  -