TY  - BOOK
AU  - Musson Ian M
AU  - Bergh Michel Van den
TI  - Invariants under tori of rings of differential operators and related topics
SN  - 0-8218-0885-0
U1  - 510 
PY  - 1998///
CY  - Providence
PB  - AMS
KW  - Differential operators
KW  - Invariants
KW  - Rings(Algebra)
ER  -