Berbiche, Mohamed; Hakem, Ali. Non-existence of global solutions for a fractional wave-diffusion equation. J. Partial Differ. Equ. 25 (2012), no. 1, 1-20.
Berbiche, Mohamed; Hakem, Ali. Necessary conditions for the existence and sufficient conditions for the nonexistence of solutions to a certain fractional telegraph equation. Mem. Differential Equations Math. Phys. 56 (2012), 37-55.
Berbiche, Mohamed; Hakem, Ali. Finite time blow-up of solutions for damped wave equation with nonlinear memory. Commun. Math. Anal. 14 (2013), no. 1, 72-84
Hakem, Ali; Berbiche, Mohamed. Blow up results for fractional differential equations and systems. Publ. Inst. Math. (Beograd) (N.S.) 93(107) (2013), 173-186.
Mekri, Zouaoui; Hakem, Ali. Left Cauchy-Riemann operator $\overline{\partial\sp l\sb {\Bbb H}}$ and Dolbeault-Grothendieck lemma on the group of Heisenberg type $\Bbb H\sp B\sb n(\Bbb C)$. Complex Var. Elliptic Equ. 59 (2014), no. 8, 1185-1199
Ferhat, Mohamed; Hakem, Ali. Global existence and asymptotic behavior for a coupled system of viscoelastic wave equations with a delay term. J. Partial Differ. Equ. 27 (2014), no. 4, 293-317
Ferhat, Mohamed; Hakem, Ali. On convexity for energy decay rates of a viscoelastic wave equation with a dynamic boundary and nonlinear delay term. Facta Univ. Ser. Math. Inform. 30 (2015), no. 1, 67-87.
Ferhat, Mohamed; Hakem, Ali. Energy decay result in a quasilinear parabolic system with viscoelastic term. Appl. Math. E-Notes 16 (2016), 56-64
Ferhat, Mohamed; Hakem, Ali. Asymptotic behavior for a weak viscoelastic wave equations with a dynamic boundary and time varying delay term. J. Appl. Math. Comput. 51 (2016), no. 1-2, 509-526
Ferhat, Mohamed; Hakem, Ali. Well-posedness and asymptotic stability of solutions to a Bresse system with time varying delay terms and infinite memories. Facta Univ. Ser. Math. Inform. 31 (2016), no. 1, 97-124
Ferhat, Mohamed; Hakem, Ali. Global existence and energy decay result for a weak viscoelastic wave equations with a dynamic boundary and nonlinear delay term. Comput. Math. Appl. 71 (2016), no. 3, 779-804