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@article{DBLP:journals/jat/LiN02,
author = {Chong Li and
Renxing Ni},
title = {Derivatives of Generalized Distance Functions and Existence
of Generalized Nearest Points},
journal = {Journal of Approximation Theory},
volume = {115},
number = {1},
year = {2002},
pages = {44-55},
ee = {http://dx.doi.org/10.1006/jath.2001.3651},
bibsource = {DBLP, http://dblp.uni-trier.de}
}
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