Solvability of nonlinear Hammerstein quadratic integral equations. El-Sayed, A.M.A., Hashem, H.H.G. (2009) The Journal of Nonlinear Sciences and its Applications
Systems of nonlinear delay integral equations modelling population growth in a periodic environment Antonio Cañada, Abderrahim Zertiti (1994) Commentationes Mathematicae Universitatis Carolinae In this paper we study the existence and uniqueness of positive and periodic solutions of nonlinear delay integral systems of the type x ( t ) = ∫ t - τ 1 t f ( s , x ( s ) , y ( s ) ) d s y ( t ) = ...