TY  - JOUR
AU  - Yang-Chun Chang
AU  - P. Tomas
TI  - Invertibility of some second order differential operators
JO  - Studia Mathematica
PY  - 1984
SP  - 289
EP  - 296
VL  - 79
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm-79-3-289-296/
DO  - 10.4064/sm-79-3-289-296
LA  - en
ID  - 10_4064_sm_79_3_289_296
ER  -