Bel’skiiD. V., & PelyukhG. P. (2005). On the behavior of solutions of linear functional differential equations with constant coefficients and linearly transformed argument in neighborhoods of singular points. Ukrains’kyi Matematychnyi Zhurnal, 57(12), 1668–1676. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/3717