Affiliation: | 1. Department of Mathematics, Faculty of Science and Literature, ?zmir University of Economics, Sakarya Caddesi, 35330 ?zmir, Turkey;2. Deparmento de Informatica, Instituto Politecnico da Guarda, Av.Dr. Francisco Sa Carneiro, 506301-559 Guarda, Portugal;3. Faculty of Engineering and Computing, Decision Support (Statistics & Operations Research) Group, Coventry University, Armstrong Siddeley Building, Priory Street, CV1 5FB Coventry, UK |