N. L. Denysenko and A. M. Samoilenko, “On solutions of linear functional differential equations with linearly transformed argument on a semiaxis”, Ukr. Mat. Zhurn., vol. 59, no. 4, pp. 501–513, Apr. 2007, Accessed: Feb. 01, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3324