1. School of Mathematical Sciences, Universiti Sains Malaysia, Penang, Malaysia. dasmenteh@usm.my
2. Consulting Prof. at Faculty of Mathematics and Computer Science, Bucharest University, Bucharest, Romania. aadrian@gmail.com
3. DMAS, LKC FES, Universiti Tunku Abdul Rahman, Kajang, Malaysia. deniswong@utar.edu.my