1. Department of Mathematics Pabna University of Science and Technology Pabna Bangladesh
2. School of Science and Technology University of New England Armidale NSW Australia
3. Department of Mathematics Mawlana Bhashani Science and Technology University Tangail Bangladesh
4. Urban Transportation Laboratory Nagaoka University of Technology Nagaoka Niigata Japan
5. Department of Applied Mathematics University of Rajshahi Rajshahi Bangladesh