1. Computation-based Science and Technology Research Center (CaSToRC), The Cyprus Institute, 20 Constantinou Kavafi Street, 2121 Nicosia, Cyprus
2. School of Mathematics, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
3. Department of Physics & Mathematics, University of Hull, Hull HU6 7RX, UK
4. Department of Mathematics & Statistics, Macquarie University, Sydney, NSW 2113, Australia