1. Department of Mathematics Abdul Wali Khan University Mardan Khyber‐Pakhtunkhwa Pakistan
2. Department of Physics Abdul Wali Khan University Mardan Khyber‐Pakhtunkhwa Pakistan
3. Faculty of Mathematics and Statistics Ton Duc Thang University Ho Chi Minh City Vietnam
4. Informetrics Research Group Ton Duc Thang University Ho Chi Minh City Vietnam