1. Bengtsson, L.R., Galia, T., Gustafson, C., Hjorring, C., Kohl, N.: Railway crew pairing optimization. C. R. a. T. Report, Carmen Systems AB (2004)
2. Caprara, A., Fischetti, M., Toth, P., Vigo, D., Guida, P.L.: Algorithms for railway crew management. Math. Program. 79(1-3), 125–141 (1997)
3. Caprara, A., Fischetti, M., Toth, P.: A heuristic method for the set covering problem. Oper. Res. 47(5), 730–743 (1999)
4. Caprara, A., Monaci, M., Toth, M.: A global method for crew planning in railway applications. In: Daduna, J., Voss, S. (eds.) Computer-Aided Transit Scheduling. Lecture Notes in Economics and Mathematical Systems, vol. 505, pp. 17–36. Springer, New York (2001)
5. Cavique, I., Rego, C., Themido, I.: Subgraph ejection chains and tabu search for the crew scheduling problem. J. Oper. Res. Soc. 50(6), 608–616 (1999)