共 2 条
- [1] The Complexity of Computing Steiner Minimal Trees[J] . M. R. Garey,R. L. Graham,D. S. Johnson.SIAM Journal on Applied Mathematics . 1977 (4)
- [2] An 1.582-approximation algorithm for the metric uncapacitated facility location problem .2 Sviridenko M. Proceedings of the 9th Conference on Integer Programming and Combinatorial Optimiza- tion . 2002