Xu, Bin et Yuan, Rong, The Existence of Positive Almost Periodic Type Solutions for Some Nonlinear Delay Integral Equations, Acta mathematica Sinica. English series (Print) , 21(6), 2005, pp. 1351-1360
This paper presents the conditions of existence of positive almost periodic type solutions for some nonlinear delay integral equations, by using a fixed point theorem in the mixed monotone operators (Ma, Y.: On a class of mixed monotone operators and a kind of two.point bounded value problem. Indian J. Math., 41(2), 211.220 (1999)). Some known results are extended.