1. The Institute for Fundamental Study; “The Tah Poe Academia Institute”; Naresuan University; Phitsanulok 65000 Thailand
2. Thailand Center of Excellence in Physics; Ministry of Education; Bangkok 10400 Thailand
3. Department of Physics; Babes-Bolyai University; Kogalniceanu Street Cluj-Napoca 400084 Romania
4. Department of Mathematics; University College London; Gower Street London WC1E 6BT United Kingdom