a1 Department of Mathematics, Yunnan University, Kunming, Yunnan 650091, People's Republic of China.
Sufficient conditions are obtained for the existence of a globally attracting positive periodic solution of the mutualism model
where ri, Ki, αi C(R, R+) and αi > Ki, i = 1, 2, τi, σi C(R, R+), i = 1, 2, and ri, Ki, αi, τi, σi (i = 1, 2) and functions of period ω > 0.
(Received October 04 1996)
(Revised July 18 2000)