@ARTICLE {895,
author={P. Aguiar and M. A. T. Figueiredo},
doi={},
journal={IEEE Transactions on Pattern Analysis and Machine Intelligence},
title={Orientation in Manhattan:  equiprojective classes and sequential estimation},
year={2005},
month={May},
volume={27},
number={5},
pages={822-826},
ISSN={0162-8828}
}