| Affiliation: | 1. Department of Mathematics, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece;2. Department of Mathematics, KU Leuven, Celestijnenlaan 200B, Leuven B-3001, Belgium;1. School of Mathematics and Computational Science, Hunan University of Science and Technology, Xiangtan, 411201, PR China;2. Department of Mathematics, Jiangxi University of Science and Technology, Jiangxi, 341000, PR China;1. Department of Chemistry, Government College of Technology, Coimbatore 641013, India;2. The University College, Department of Chemistry, Sungkyunkwan University, Suwon 440-746, South Korea |
