Existence and exponential stability of positive almost periodic solutions for a model of hematopoiesis. Alzabut, J.O.; Nieto, J.J.; Stamov, G.Tr. — 2009 Boundary Value Problems [electronic only]

On the oscillatory behavior for a certain class of third order nonlinear delay difference equations. Saker, S.H.; Alzabut, J.O.; Mukheimer, A. — 2010 Electronic Journal of Qualitative Theory of Differential Equations [electronic only]