title = {Staying in the middle: exact and approximate medians in $R^1$ and $R^2$ for moving points},
author = {Pankaj Kumar Agarwal and Mark T. de Berg and Jie Gao and Leonidas J. Guibas and Sariel Har-Peled},
booktitle = {Proc. 17th Canad. Conf. Computational Geometry (CCCG 2005)},
year = {2005},
url = {}}

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