施吕蓉 ,周宗福,高伟.一类三阶具多偏差变元微分方程的周期解[J].重庆工商大学学报(自然科学版),2013,30(1):6-9
SHI Lu-rong, ZHOU Zong-fu, GAO Wei. The Existence of Periodic Solution to a Class of Third-order Differential Equation with Deviating Argument[J]. Journal of Chongqing Technology and Business University(Natural Science Edition),2013,30(1):6-9