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Phase Portrait and Zero-Isoclines for System x ′ = y 2 (1 − x) − 0.1x, y ′ = x 2 (1 − y) − 0.4y 

Phase Portrait and Zero-Isoclines for System x ′ = y 2 (1 − x) − 0.1x, y ′ = x 2 (1 − y) − 0.4y 

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In this paper we find the possible phase portraits and bifurcations for a general class of host-vector epidemic models with non-linear incidence function generalizing the Ross model.