1. Differential-difference equations;Bellman,1963
2. An analysis of the complex dynamic behaviour of nonlinear oligopoly models with time delays;Chiarella;Chaos, Solitons & Fractals,1996
3. Limit cycles in nonlinear oligopolies with continuously distributed time delays;Chiarella,2002
4. Integro-differential equations and delay models in population dynamics;Cushing,1977
5. Introduction to functional differential equations;Hale,1993