Ahmad, BashirNieto Roig, Juan José2020-06-062020-06-062009Ahmad, B., & Nieto, J. J. (2009). Existence of solutions for nonlocal boundary value problems of higher-order nonlinear fractional differential equations. In Abstract and Applied Analysis. Volume 2009, Article ID 494720, 9 pages. doi:10.1155/2009/4947201085-3375http://hdl.handle.net/10347/22854We study some existence results in a Banach space for a nonlocal boundary value problem involving a nonlinear differential equation of fractional order q given by cDqxt ft, xt , 0 <t< 1, q ∈ m − 1, m , m ∈ N, m ≥ 2, x0 0, x 0 0, x 0 0,...,xm−2 0 0, x1 αxη . Our results are based on the contraction mapping principle and Krasnoselskii’s fixed point theorem.engCopyright © 2009 B. Ahmad and J. J. Nieto. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly citedhttp://creativecommons.org/licenses/by/2.0journal article10.1155/2009/494720open access