1. MaSIM Focus Area, North-West University, Mafikeng Campus, Mmabatho 2735, South Africa
2. Center for Nonlinear Dynamics and Control, Villanova University, Villanova, PA 19805, USA
3. National Advanced School of Engineering, University of Yaoundé I, BP 337, Yaoundé, Cameroon
4. Department of Mathematical Sciences, University of Stellenbosch, Stellenbosch 7600, South Africa
5. Department of Mathematics, Celal Bayar University, Muradiye Campus, 45047 Manisa, Turkey