1. Laporte, G., Asef-Vaziri, A., Sriskandarajah, C.: Some applications of the generalized travelling salesman problem. J. Oper. Res. Soc. 47(12), 1461–1467 (1996)
2. Noon, C.E., Bean, J.C.: An efficient transformation of the generalized traveling salesman problem. INFOR 31(1), 39–44 (1993)
3. Behzad. A., Modarres, M.: A New efficient transformation of generalized traveling salesman problem into traveling salesman problem. In: Proceedings of the 15th International Conference of Systems Engineering, ICSE (2002)
4. Ben-Arieh, D., Gutin, G., Penn, M., Yeo, A., Zverovitch, A.: Transformations of generalized ATSP into ATSP. Oper. Res. Lett. 31(5), 357–365 (2003)
5. Laporte, G., Semet, F.: Computational evaluation of a transformation procedure for the symmetric generalized traveling salesman problem. INFOR 37(2), 114–120 (1999)