%0 Journal Article
%A Karakostas, G.L.
%A Tsamatos, P.Ch.
%T Positive solutions and nonlinear eigenvalue problems for retarded second order differential equations
%J Electronic Journal of Differential Equations
%D 2002
%V 2002
%I mathdoc
%U http://geodesic.mathdoc.fr/item/EJDE_2002__2002__a45/
%G en
%F EJDE_2002__2002__a45