1. Impulsive Structures with Delayed Feedback;Morugin,1961
2. Resistence of Impact with Retarded Inverse Connections;Morugin,1961
3. Existence, uniqueness and extendibility of solutions of Volterra integral systems with multiple variable lags;Bownds;Funkcial. Ekvac.,1976
4. A. Logunov, On integral inequalities for equations of Volterra type with delay, Dokl. Akad. Nauk SSSR 150 (163), 256–258. [In Russian]
5. Comparison theorem for Volterra equations with delay;Logunov;Differentsial'nye Uravneniya,1966