中国科学院数学与系统科学研究院期刊网
Almost Periodic Solutions of Second-Order Neutral Delay-Differential Equations with Piecewise Constant Argument
Li WANG, Chuang Yi ZHANG
Acta Mathematica Sinica, Chinese Series . 2010, (2): 227 -232 .  DOI: 10.12386/A2010sxxb0028