TY  - JOUR
AU  - Karakostas, G.L.
AU  - Tsamatos, P.Ch.
TI  - Positive solutions and nonlinear eigenvalue problems for retarded second order differential equations
JO  - Electronic Journal of Differential Equations
PY  - 2002
VL  - 2002
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/EJDE_2002__2002__a145/
LA  - en
ID  - EJDE_2002__2002__a145
ER  -