Electronic Journal of Differential Equations,
Vol. 2007(2007), No. 155, pp. 1-10.

Title: Existence of periodic  solutions of a delayed 
       predator-prey system on time scales

Author: Dandan Yang (Yangzhou Univ., China)

Abstract: 
 In this paper, we prove the  existence of  periodic solutions
 of a delayed periodic predator-prey system based on
 continuation theorem of coincidence degree.
 
Submitted July 8, 2007. Published November 21, 2007.
Math Subject Classifications: 34C25, 92D25.
Key Words: Time scales; solution; Fixed-point theorem; 
           predator-prey system; coincidence degree theorem.