Jiancheng, Ruan, Global Behavior of a Class of Three-Dimensional Competitive Systems, Acta Mathematica Sinica, New Series Chinese Journal of Mathematics, 11(3), 1995, pp. 316-323
In this paper the global behavior of a class of three-dimensional competitive systems is investigated. The existence of semi-stable periodic orbits is proved. A generalization of the results of [1-4] is obtained.