1. Abbas, S.—Benchohra, M.: Darboux problem for partial functional differential equations with infinite delay and Caputo’s fractional derivative, Adv. Dyn. Syst. Appl. 5 (2010), 1–19.
2. Abbas, S.—Benchohra, M.: Impulsive partial hyperbolic functional differential equations of fractional order with state-dependent delay, J. Fract. Calc. Appl. 13 (2010), 225–244.
3. Abbas, S.—Benchohra, M.—Diagana, T.: Existence and attractivity results for some fractional order partial integro-differential equations with delay, Afr. Diaspora J. Math. 15 (2013), 87–100.
4. Abbas, S.—Benchohra, M.—Gorniewicz, L.: Fractional order impulsive partial hyperbolic functional differential equations with variable times and state-dependent delay, Math. Bulletin 7 (2010), 317–350.
5. Abbas, S.—Benchohra, M.— N’guérékata, G. M.: Topics in Fractional Differential Equations, Springer, New York, 2012.