中文摘要：

用Manasevich-Mawhin连续定理，证明了一类p-Laplacian一类Duffing方程正周期解的存在性和唯一性，得到新的结论并改进前人的一些结论．

英文摘要：

By using Manasevich-Mawhin continuation and uniqueness of positive periodic solutions for Duffing theorem, some sufficient conditions for existence type p-Laplacian-like equations were established. The results were new and some previous known results were complemented.