中国科学院数学与系统科学研究院期刊网
AMS
The Existence of Positive Almost Periodic Type Solutions for Some Nonlinear Delay Integral Equations
Bin XU, Rong YUAN
Acta Mathematica Sinica . 2005, (6): 1351 -1360 .  DOI: 10.1007/s10114-005-0590-9