1. Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Kuala Terengganu, Malaysia
2. Department of Mathematical Sciences, Faculty of Science, University Technology Malaysia, 81310 Johor Bahru, Johor, Malaysia
3. Department of Mathematics, Iran University of Science and Technology, Narmak, Tehran 16844, Iran