1. Archetti, C., Savelsbergh, M., Speranza, M.G.: The vehicle routing problem with occasional drivers. Eur. J. Oper. Res. 254, 472–480 (2016)
2. Arslan, A.M., Agatz, N., Kroon, L., Zuidwijk, R.: Crowdsourced delivery: a dynamic pickup and delivery problem with ad-hoc drivers. In: Erasmus Research Institute of Management ERIM Paper, Social Science Research Network (2016).
http://papers.ssrn.com/sol3/papers.cfm?abstracs_id=2726731
3. Bektaş, T., Laporte, G.: The pollution-routing problem. Transp. Res. Part B 45, 1232–1250 (2011)
4. Dahle, L., Andersson, H., Christiansen, M.: The vehicle routing problem with dynamic occasional drivers. In: Lecture Notes in Computer Science. 10572 LNCS, pp. 49-63 (2017)
5. Demir, E., Bektaş, T., Laporte, G.: An adaptive large neighborhood search heuristic for the pollution-routing problem. Eur. J. Oper. Res. 223, 346–359 (2012)