1. Extremal Standardization Problems;Beresnev,1978
2. Solving some combinatorial problems of optimal planning by the method of successive calculations;Cherenin,1962
3. Graph Theory: An Algorithmic Approach;Christofides,1975
4. The uncapacitated facility location problem;Cornuejols,1990
5. A dual-based procedure for uncapacitated facility location;Erlenkotter;Operations Research,1978