Xz. He et K. Gopalsamy, PERSISTENCE, STABILITY AND LEVEL-CROSSINGS IN AN INTEGRODIFFERENTIAL SYSTEM, Journal of mathematical biology, 32(5), 1994, pp. 395-426
Dynamical characteristics of an integrodifferential system modelling t
wo species competition with hereditary effects are investigated; in pa
rticular we derive sufficient conditions for the persistence of the sp
ecies, existence of an attracting periodic solution and 'level-crossin
gs' of solutions about the periodic solution.