Fig. 2. Phase portrait of system (2) for with parameters values\(\ k_{1}=0.6,\ \ k_{2}=0.01,\)\(r_{1}=12,\ r_{2}=2,\ \alpha=5,\ \beta=1,\ \varepsilon=1,\ \mu=0.01,\ c_{1}=1,\ c_{2}=1,\ d=1,\ h=0.001.\)