1. Control of population size and stability through diffusion: A stage-structure model. (in Chinese);Zheng;Journal of Biomathematics,2001
2. Evolutionary Ecology;Pianka,1974
3. Coincidence Degree and Non-Linear Differential Equations;Gaines,1977
4. CBMS Regional Conf. Ser. in Math.;Mawhin,1979
5. Coincidence degree and periodic solutions of neutral equations;Hale;J. Differential Equations,1974