TY  - JOUR
AU  - Brown, R. C.
AU  - Hinton, D. B.
TI  - Two separation criteria for second order ordinary or partial differential operators
JO  - Mathematica Bohemica
PY  - 1999
SP  - 273
EP  - 292
VL  - 124
IS  - 2-3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/MB.1999.126251/
DO  - 10.21136/MB.1999.126251
LA  - en
ID  - 10_21136_MB_1999_126251
ER  -