1. Department of Mathematics, COMSATS University Islamabad, Attock Campus , Attock , Pakistan
2. Department of Mathematics, University of the Punjab , Lahore 54590 , Pakistan
3. Institute of Ground Water Studies, Faculty of Natural and Agricultural Sciences, University of the Free State , Bloemfontein , South Africa
4. Department of Basic Sciences and Related Studies, Mehran University of Engineering and Technology , Jamshoro , Pakistan
5. CONACyT-Tecnológico Nacional de México/CENIDET, Interior Internado Palmira S/N, Col. Palmira, C.P. 62490 , Cuernavaca , Morelos , Mexico
6. Department of Mechanical Engineering, College of Engineering, Prince Sattam bin Abdulaziz University , Wadi addawaser 11991 , Saudi Arabia
7. Production Engineering and Mechanical Design Department, Faculty of Engineering, Mansoura University , P.O 35516 , Mansoura , Egypt