Li, J., Zhao,Y., and Zhu, H., 2015: Bifurcation of an SIS model with nonlinear contact rate, Journal of Mathematical Analysis and Applications, Vol. 432 (2), p. 1119-1138
Li, J., Zhao,Y., and Zhu, H., 2015: Bifurcation of an SIS model with nonlinear contact rate, Journal of Mathematical Analysis and Applications, Vol. 432 (2), p. 1119-1138