%0 Journal Article %T New Existence Results for Higher-Order Nonlinear Fractional Differential Equation with Integral Boundary Conditions %A Meiqiang Feng %A Xuemei Zhang %A WeiGao Ge %J Boundary Value Problems %D 2011 %I Springer %R 10.1155/2011/720702 %X This paper investigates the existence and multiplicity of positive solutions for a class of higher-order nonlinear fractional differential equations with integral boundary conditions. The results are established by converting the problem into an equivalent integral equation and applying Krasnoselskii's fixed-point theorem in cones. The nonexistence of positive solutions is also studied. %U http://dx.doi.org/10.1155/2011/720702