Abdul Rehman

Department of Mathematics, University of Balochistan, Quetta, Pakistan

Ghulam Farooq

Department of Mathematics, University of Balochistan, Quetta, Pakistan

Israr Ahmed

Department of Mathematics, University of Balochistan, Quetta, Pakistan

Muhammad Naseer

Department of Mathematics, Quaid-i-Azam University, Islamabad, Pakistan

Muhammad Zulfiqar

Department of Mathematics, GC University, Lahore, Pakistan