1. Department of Logistics Management, Gutenberg School of Management and Economics, Johannes Gutenberg University of Mainz, 55122 Mainz, Germany;
2. Chair of Logistics, Department of Business Studies and Economics, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany;
3. Istituto di Analisi dei Sistemi ed Informatica “Antonio Ruberti” – Consiglio Nazionale delle Ricerche (IASI-CNR), 00185, Rome, Italy;
4. Université Sorbonne Paris Nord, LIPN, CNRS, UMR 7030, 93430, Villetaneuse, France;
5. Department of Mathematics and Computer Science, University of Cagliari, 09124 Cagliari, Italy