Ebaid, Abdelhalim, and Hind K. Al-Jeaid. 2021. “ON THE EXACT SOLUTION OF THE FUNCTIONAL DIFFERENTIAL EQUATION $y^{\prime}(t)=a y(t)+b Y(-t)$”. Advances in Differential Equations and Control Processes 26 (December), 39–49. https://doi.org/10.17654/0974324322003.