%0 Journal Article %A Tiryaki, Aydin %T Sturm-Picone type theorems for second-order nonlinear elliptic differential equations %J Electronic journal of differential equations %D 2014 %V 2014 %U http://geodesic.mathdoc.fr/item/EJDE_2014__2014__a103/ %G en %F EJDE_2014__2014__a103