TY  - JOUR
AU  - Costa, David G.
AU  - Tehrani, Hossein
AU  - Yang, Jianfu
TI  - On a variational approach to existence and multiplicity results for semipositone problems
JO  - Electronic Journal of Differential Equations
PY  - 2006
VL  - 2006
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/EJDE_2006__2006__a192/
LA  - en
ID  - EJDE_2006__2006__a192
ER  -