%0 Journal Article
%A Chen, Yi
%A Lv, Zhanmei
%T Positive solutions for fractional differential equations with variable coefficients
%J Electronic Journal of Differential Equations
%D 2012
%V 2012
%I mathdoc
%U http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a59/
%G en
%F EJDE_2012__2012__a59