title = {A simple factor-3 approximation for labeling points with circles},
author = {M. H. Jiang and J. B. Qian and Z. P. Qin and Binhai Zhu and Robert J. Cimikowski},
journal = {Information Processing Letters},
volume = {87},
number = {2},
pages = {101--105},
month = {Jul},
year = {2003}}

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