OstRab-JACM-02

@article{OstRab-JACM-02,
title = {Polynomial-time approximation schemes for geometric min-sum median clustering},
author = {Rafail Ostrovsky and Yuval Rabani},
journal = {J. ACM},
publisher = {ACM},
volume = {49},
number = {2},
pages = {139--156},
month = {Mar},
year = {2002}}