| Authors: |
Abukwaik R; Mathematics Department, Faculty of Science and Arts, King Abdulaziz University, Rabigh, Saudi Arabia; School of Mathematics, University of Birmingham, B15 2TS, United Kingdom. Electronic address: rabukwaik@kau.edu.sa., Vera-Siguenza E; School of Mathematics, University of Birmingham, B15 2TS, United Kingdom; Institute of Metabolism and Systems Research, College of Medical and Dental Sciences, University of Birmingham, B15 2TT, United Kingdom. Electronic address: e.vera-siguenza@bham.ac.uk., Tennant DA; Institute of Metabolism and Systems Research, College of Medical and Dental Sciences, University of Birmingham, B15 2TT, United Kingdom., Spill F; School of Mathematics, University of Birmingham, B15 2TS, United Kingdom. Electronic address: f.spill@bham.ac.uk. |