1. Aldaihani, M., & Dessouky, M. M. (2003). Hybrid scheduling methods for paratransit operations. Computers & Industrial Engineering, 45, 75–96.
2. Bodin, L. D., & Sexton, T. (1986). The multi-vehicle subscriber dial-a-ride problem. TIMS Studies in Management Science, 2, 73–86.
3. Borndörfer, R., Klostermeier, F., Grötschel, M., & Küttner, C. (1997). Telebus Berlin: vehicle scheduling in a dial-a-ride system, Technical report SC 97-23, Konrad-Zuse-Zentrum für Informationstechnik, Berlin.
4. Brotcorne, L., Laporte, G., & Semet, F. (2003). Ambulance location and relocation models. European Journal of Operational Research, 147, 451–468.
5. Colorni, A., & Righini, G. (2001). Modeling and optimizing dynamic dial-a-ride problems. International Transactions in Operational Research, 8, 155–166.