“…By employing a few famous tools in nonlinear analysis including the nonlinear alternative of Leray-Schauder type, Banach's fixed point theorem, Schauder's fixed point theorem, Krasnoselskii's fixed point theorem, coincidence degree theory and critical point theory, the authors [3, 4, 9, 13-16, 18, 25, 27, 28] and others proved the existence of nonoscillatory solutions, uncountably many bounded nonoscillatory solutions and periodic solutions for the difference equations above, where Lipschitz conditions were used in [14,16]. Recently, the authors [32] used the Krasnoselskii's fixed point theorem to obtain ℎ-asymptotic stability results about the zero solution for a very general first order nonlinear neutral differential equation with functional delay.…”