TY  - JOUR
AU  - Martin Schechter
TI  - Scattering Theory for Elliptic Operators of Arbitrary Order
JO  - Commentarii mathematici Helvetici
PY  - 1974
SP  - 84
EP  - 113
VL  - 49
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1974__49_139572/
ID  - CMH_1974__49_139572
ER  -