TY  - JOUR
AU  - Swanson, C.A.
TI  - Nonoscillation Criteria for Elliptic Equations
JO  - Canadian mathematical bulletin
PY  - 1969
SP  - 275
EP  - 280
VL  - 12
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-034-4/
DO  - 10.4153/CMB-1969-034-4
ID  - 10_4153_CMB_1969_034_4
ER  -