1. Suleman Khan:
Department of Mathematics, Azad Jammu and Kashmir University, Muzaffarabad, Pakistan
2. Amanullah Khan:
Department of Mathematics, Azad Jammu and Kashmir University, Muzaffarabad, Pakistan
3. Musarrat Khan:
F. G. Degree College, Chilas Diamer, Pakistan
4. Naseer Ahmed:
Department of Mathematics, Quaid-i-Azam University, Islamabad, Pakistan