1. School of Mathematics Science, University of Tabriz, Tabriz, Iran
2. Buckingham Business School, University of Buckingham, Buckingham, UK
3. Business Systems and Analytics Department, Distinguished Chair of Business Analytics, La Salle University, Philadelphia, Pennsylvania, USA
4. Business Information Systems Department, Faculty of Business Administration and Economics, University of Paderborn, Paderborn, Germany
5. Department of Mathematics and Statistics, York University, Toronto, Canada
6. Polo Tecnologico IISS G. Galilei, Bolzano, Italy