1. Differential-Difference Equations;Bellman,1963
2. The global attractivity of the rational difference equation yn=1+(yn-k/yn-m);Berenhaut;Proc. Am. Math. Soc.,2007
3. On the existence and uniqueness of periodic solutions of systems of nonlinear differential-functional equations with linear deviation of an argument;Blashchak;Dopov. Nats. Akad. Nauk Ukr.,1997
4. Existence, uniqueness, and continuous dependence for hereditary system;Cruz;Ann. Mat. Pura Appl.,1970
5. Lectures on the Mathematical Theory of Stability;Demidovich,1970