1. Department of Mathematics and Informatics, Abbes Laghror University, Khenchela 40000, Algeria
2. University of Banja Luka, Faculty of Electrical Engineering, Patre 5, Banja Luka 78000, Bosnia and Herzegovina
3. Department of Mathematics, Gilan-E-Gharb Branch, Islamic Azad University, Gilan-E-Gharb, Iran
4. Université de Sousse, Institut Supérieur d’Informatique et des Techniques de Communication, H. Sousse 4000, Tunisia
5. China Medical University Hospital, China Medical University, Taichung 40402, Taiwan
6. Department of Mathematics and Applied Mathematics, Sefako Makgatho Health Sciences University, Ga-Rankuwa, South Africa
7. Department of Mathematics (SSC), University of Management and Technology, C-II, Johar Town, Lahore, Pakistan