%0 Journal Article %A Kejun Zhuang and Zhaohui Wen %D 2010 %J International Journal of Mathematical and Computational Sciences %B World Academy of Science, Engineering and Technology %I Open Science Index 37, 2010 %T Analysis for a Food Chain Model with Crowley–Martin Functional Response and Time Delay %U https://publications.waset.org/pdf/7389 %V 37 %X This paper is concerned with a nonautonomous three species food chain model with Crowley–Martin type functional response and time delay. Using the Mawhin-s continuation theorem in theory of degree, sufficient conditions for existence of periodic solutions are obtained. %P 138 - 141