Taha Ghasemi, Mohammadreza Razzazi. A PTAS for the cardinality constrained covering with unit balls. Theoretical Computer Science, 527:50-60, 2014. [doi]
@article{GhasemiR14,
title = {A PTAS for the cardinality constrained covering with unit balls},
author = {Taha Ghasemi and Mohammadreza Razzazi},
year = {2014},
doi = {10.1016/j.tcs.2014.01.026},
url = {http://dx.doi.org/10.1016/j.tcs.2014.01.026},
researchr = {https://researchr.org/publication/GhasemiR14},
cites = {0},
citedby = {0},
journal = {Theoretical Computer Science},
volume = {527},
pages = {50-60},
}