TY  - JOUR
AU  - Joshi, M.S.
TI  - Geometric proofs of composition theorems for generalized Fourier integral operators.
JO  - Portugaliae mathematica
PY  - 1999
SP  - 129
EP  - 154
VL  - 56
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1999__56_2_48455/
LA  - en
ID  - PORMA_1999__56_2_48455
ER  -