H. El-Owaidy, A. M. A. El-Sayed, Reda Gamal Ahmed. Existence of solutions of a coupled system of functional integro-differential equations of arbitrary (fractional) orders. Malaya J. Mat. [Internet]. 2018 Oct. 1 [cited 2024 Nov. 21];6(04):774-80. Available from: https://www.malayajournal.org/index.php/mjm/article/view/928