1. Department of Logistics Management, Helmut Schmidt University, Hamburg, Germany
2. Department of Physics and Computer Science, Wilfrid Laurier University, Waterloo, ON, Canada
3. Department of Industrial and Systems Engineering, University of Florida, Gainesville, FL, USA
4. National Research University Higher School of Economics, Laboratory of Algorithms and Technologies for Network Analysis, Nizhny Novgorod Russia
5. Department of Computer Science and Engineering, University of Ioannina, Ioannina, Greece