[1
]Department of Mathematics Abdul Wali Khan University Mardan Khyber Pakhtunkhwa Pakistan
[2
]Department of Mathematics University of Lakki Marwat Lakki Marwat 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