@INPROCEEDINGS {2939,
author={J. M. Pedro and P. Monteiro and J. J. O.  Pires},
doi={},
booktitle={IASTED International Conf. on Optical Communication Systems and Networks - OCSN},
title={Comparison of Interconnection Architectures for WDM Shared Protection Rings},
year={2004},
month={July},
volume={1},
pages={1-1} 
}