1. Heriot-Watt University Malaysia, Kabul University,Mathematical and Computer Sciences, Faculty of Mathematics,Putrajaya,Malaysia
2. Heriot-Watt University (of Maxwell Institute for Mathematical Sciences),Mathematical and Computer Sciences,Edinburgh,United Kingdom
3. School of Engineering and Physical Sciences Heriot-Watt University Malaysia,Putrajaya,Malaysia
4. School of Mathematical and Computer Sciences Heriot-Watt University Malaysia,Putrajaya,Malaysia