EL-Sayed A.M.A, Eman Hamdallah, Ebead H.R. Positive solutions of an initial value problem of a delay-self-reference nonlinear differential equation. Malaya J. Mat. [Internet]. 2020 Jul. 1 [cited 2024 Nov. 4];8(03):1001-6. Available from: https://www.malayajournal.org/index.php/mjm/article/view/1548