1. Department of Mathematics and Mechanics, China University of Mining and Technology, Xuzhou, China
2. Department of Mathematics and Computer Sciences, Faculty of Arts and Sciences, Cankaya University, Ankara, Turkey + Department of Chemical and Materials Engineering, Faculty of Engineering, King Abdulaziz University, Jeddah, Saudi Arabia + Institute of Sp
3. Faculty of Mechanical Engineering, Belgrade
4. Mathematical Institute SANU, Belgrade