@article{(Open Science Index):https://publications.waset.org/pdf/7389,
	  title     = {Analysis for a Food Chain Model with Crowley–Martin Functional Response and Time Delay},
	  author    = {Kejun Zhuang and  Zhaohui Wen},
	  country	= {},
	  institution	= {},
	  abstract     = {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.
},
	    journal   = {International Journal of Mathematical and Computational Sciences},
	  volume    = {4},
	  number    = {1},
	  year      = {2010},
	  pages     = {138 - 141},
	  ee        = {https://publications.waset.org/pdf/7389},
	  url   	= {https://publications.waset.org/vol/37},
	  bibsource = {https://publications.waset.org/},
	  issn  	= {eISSN: 1307-6892},
	  publisher = {World Academy of Science, Engineering and Technology},
	  index 	= {Open Science Index 37, 2010},
	}