具有偏差变元概周期系统概周期解的存在性

刘永建,冯春华

The Existence of Almost Periodic Solutions for Almost Periodic Systems with Deviating Argument

LIU Yong-jian,FENG Chun-hua

河北大学学报(自然科学版) . 2008, (6): 561 -564 . DOI: 10.3969/j.issn.1000-1565.2008.06.001