WASET
	@article{(Open Science Index):https://publications.waset.org/pdf/2322,
	  title     = {Periodicity for a Food Chain Model with Functional Responses on Time Scales},
	  author    = {Kejun Zhuang},
	  country	= {},
	  institution	= {},
	  abstract     = {With the help of coincidence degree theory, sufficient
conditions for existence of periodic solutions for a food chain model
with functional responses on time scales are established.},
	    journal   = {International Journal of Mathematical and Computational Sciences},
	  volume    = {2},
	  number    = {7},
	  year      = {2008},
	  pages     = {503 - 506},
	  ee        = {https://publications.waset.org/pdf/2322},
	  url   	= {https://publications.waset.org/vol/19},
	  bibsource = {https://publications.waset.org/},
	  issn  	= {eISSN: 1307-6892},
	  publisher = {World Academy of Science, Engineering and Technology},
	  index 	= {Open Science Index 19, 2008},
	}