1. Centre for Advanced Studies in Pure and Applied Mathematics Bahauddin Zakariya University Multan Pakistan
2. School of Mathematical Sciences University of Science and Technology of China Hefei China
3. Department of Mathematics University of Education Lahore, Multan Campus Multan Pakistan
4. Informetrics Research Group Ton Duc Thang University Ho Chi Minh City Vietnam
5. Faculty of Mathematics and Statistics Ton Duc Thang University Ho Chi Minh City Vietnam