Affiliation: | (1) Department of Statistics and Operations Research, Faculty of Sciences, University of Alicante, Alicante, Spain;(2) Department of Statistics and Operations Research, Faculty of Sciences, University of Alicante, Alicante, Spain;(3) Department of Mathematics, Faculty of Physical, Mathematical, and Natural Sciences, National University of San Luis, San Luis, Argentina;(4) Institute of Mathematics, Bulgarian Academy of Sciences, Plovdiv, Bulgaria |