中国科学院数学与系统科学研究院期刊网
AMS
Pseudo Almost Periodic Solutions of a Singularly Perturbed Differential Equation with Piecewise Constant Argument
Guo Jian LIN, Rong YUAN
Acta Mathematica Sinica . 2007, (3): 423 -438 .  DOI: 10.1007/s10114-005-0588-3