“…Given the high degree of complexity, metaheuristics have been proposed to tackle larger instances and problems with multiple vehicles. We refer the interested reader to the heuristic papers by Rainer-Harbach, Papazek, Raidl, Hu, and Kloimüllner (2014), Papazek, Raidl, Rainer-Harbach, and Hu (2013), Gaspero, Rendl, and Urli (2013), and Schuijbroek, Hampshire, and van Hoeve (2013). In what follows, we will focus on the studies about exact methods for bicycle rebalancing problems.…”