@INPROCEEDINGS {10016,
author={F. Martins},
doi={},
booktitle={International Conf. in Mathematics, Sciences and Science Education - ICMSE},
title={Points on a Plane Closest to a Point, when Measuring with 1-Norm and inf-Norm (J. Vitória, P. Tadeu, C. Costa, F. Martins and R. Serôdio)},
year={2006},
month={June},
volume={1},
pages={29-31} 
}