1. Ahmad, B., Nieto, J.J.: Existence results for nonlinear boundary value problems of fractional integrodifferential equations with integral boundary conditions. Bound. Value Probl. (2009). Art. ID 708576, pages 11. doi: 10.1155/2009/708576
2. Ahmad, B., Nieto, J.J.: Existence of solutions for anti-periodic boundary value problems involving fractional differential equations via Leray-Schauder degree theory. Topol. Methods Nonlinear Anal. (2009, to appear)
3. Ahmad, B., Otero-Espinar, V.: Existence of solutions for fractional differential inclusions with anti-periodic boundary conditions. Bound. Value Probl. (2009) Art. ID 625347, pages 11. doi: 10.1155/2009/625347
4. Ahmad, B., Nieto, J.J.: Existence and approximation of solutions for a class of nonlinear impulsive functional differential equations with anti-periodic boundary conditions. Nonlinear Anal. 69, 3291–3298 (2008)
5. Ahmad, B.: Existence of solutions for second order nonlinear impulsive boundary value problems. Electron. J. Differ. Equ. 68, 1–7 (2009)