Affiliation: | (1) Operations Research Center, Miguel Hernández University of Elche, 03202 Elche (Alicante), Spain (e-mail: canovas@umh.es, evamaria@umh.es, parra@umh.es), ES;(2) Department of Statistics and Operations Research, University of Alicante, 03071 Alicante, Spain (e-mail: marco.antonio@ua.es), ES |