Dynamical trajectories using δ = 0.001 and δ = 10.0. Dynamical trajectories of the system (1) considering the fixed values of parameters given in Table 2, except those in the column marked with **. The initial conditions determine the region of attraction. For δ = 0.001 non-trivial is attractor when T(0) = 2.493 × 10-1 (a), while for δ = 10.0, when T(0) = 6.609 × 10-3 (b). The scales of vertical and horizontal axes must be multiplied by the factors shown in the legends to obtain the actual values.