8. M. Naceri, A. El-Haffaf, Existence and nonexistence of positive solutions for singular nth-order threepoint nonhomogeneous boundary value problem accpte (2016)

7. N.Mostepha, A. Özbekler, Oscillation of Sub-Linear Impulsive Differential Equation With Solution accpte (2016)

6. M. Naceri, A. El-Haffaf, Existence of positive solutions for singular fifth-order threepoint boundary value problem. Bull, malaysia(2016)

5. Mostepha Naceri , Ravi P Agarwal, Erbil Çetina, El Haffaf Amir, Existence of solutions to fourth-order differential equations with deviating arguments BVP Impact Factor: 0.84 u DOI: 10.1186/s13661-015-0373-x(JUNE 2015)

4. A.El-Haffaf , M. Naceri, Existence Theorems for a Fifth-Order Boundary Value Problem Journal of Mathematics and System Science volume (4) number 1(JANUARY 2014)

3. A.El-Haffaf , M. Naceri, Positive solutions for nonlinear fifth-order differential equations with nonlocal boundary conditions Universal Journal of Mathematics and Mathematical Sciences volume (4)(2013)

2. M. Naceri, A. El-Haffaf, Triple positive solutions for system of nonlinear secondorder three point boundary value problem Adv. Differ. Equ. Control Process volume(11)1(2013)

1. A.El-Haffaf , M. Naceri, The upper and lower solution method for nonlinear fourthorder three-point boundary value problem IJPAM, 4(2011) 595–610