1. School of Computer Science and Applied Mathematics; University of the Witwatersrand; Johannesburg Wits 2050 South Africa
2. Fen-Edebiyat Fakültesi Matematik Bölümü; Mimar Sinan Güzel Sanatlar Üniversitesi (M.S.G.S.Ü); Cumhuriyet Mahallesi Silahsör Caddesi No 71 Sisli-Bomonti Istanbul Turkey
3. International Institute for Symmetry Analysis and Mathematical Modeling, Department of Mathematical Sciences; North-West University; Mafikeng Campus, Private Bag X 2046 Mmabatho 2735 South Africa
4. DST-NRF Centre of Excellence in Mathematical and Statistical Sciences; Johannesburg South Africa