Wan, H., Zhu, H., 2010: The backward bifurcation in compartmental models for West Nile virus. Math Biosci., Vol. 227 (1), p. 20-8
Wan, H., Zhu, H., 2010: The backward bifurcation in compartmental models for West Nile virus. Math Biosci., Vol. 227 (1), p. 20-8