Generalized and smooth solutions of boundary value problems for functional-differential equations with many senior members Georgij Alexandrovič Kamenskij, Anatolij Dmitrievich Myshkis, Alexander L. Skubachevskii (1986) Časopis pro pěstování matematiky
Green's function and existence of solutions for a functional focal differential equation. Anderson, Douglas R., Anderson, Tyler O., Kleber, Mathew M. (2006) Electronic Journal of Differential Equations (EJDE) [electronic only]