A new four-dimensional hyperjerk system with stable equilibrium point, circuit implementation, and its synchronization by using an adaptive integrator backstepping control
Singh J P1, †, Pham V T2, Hayat T3, 4, Jafari S5, Alsaadi F E6, Roy B K1
       

(color online) Chaotic attractors of the circuit by PSpice: (a) X–Y plane and (b) Z–W plane.