Guang Xu, Jinhui Xu. An improved approximation algorithm for uncapacitated facility location problem with penalties. J. Comb. Optim., 17(4):424-436, 2009. [doi]
@article{XuX09,
title = {An improved approximation algorithm for uncapacitated facility location problem with penalties},
author = {Guang Xu and Jinhui Xu},
year = {2009},
doi = {10.1007/s10878-007-9127-8},
url = {http://dx.doi.org/10.1007/s10878-007-9127-8},
researchr = {https://researchr.org/publication/XuX09},
cites = {0},
citedby = {0},
journal = {J. Comb. Optim.},
volume = {17},
number = {4},
pages = {424-436},
}