@ARTICLE {5550,
author={F. Martins},
doi={},
journal={Far East Journal of Mathematical Education},
title={Conjugacy and Geometry II - Moore-Penrose Inverse and Feet of the Perpendiculars (C. Costa, F. Martins, R. Serôdio, P. Tadeu, M. A. Facas Vicente and J. Vitória)},
year={2010},
month={February},
volume={4},
number={1},
pages={25-48},
ISSN={0973-5631}
}