TY  - JOUR
AU  - Baxley, J. V.
AU  - Chapman, R. O.
TI  - A criterion for discrete spectra of partial differential operators
JO  - Czechoslovak Mathematical Journal
PY  - 1992
SP  - 403
EP  - 414
VL  - 42
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1992.128356/
DO  - 10.21136/CMJ.1992.128356
LA  - en
ID  - 10_21136_CMJ_1992_128356
ER  -