1. Faculty of Mathematics, Jammu & Kashmir Institute of Mathematical Sciences, 190008 Srinagar, Jammu and Kashmir, India
2. Department of Applied Sciences, NITTTR, Under Ministry of Education, Govt. of India, Shamla Hills, 462002 Bhopal, M.P., India
3. College of Mathematics and Systems Science, Shandong University of Science and Technology, 266 590 Qingdao, China
4. Department of Mathematics, Faculty of Science, Damanhour University, 22511 Damanhour, Egypt