@article{articlec22babfc,
title   = {A topological approach to the identification of critical measurements in power-system state estimation},
author = {Bretas, Newton Geraldo and London Junior, João Bosco Augusto and Alberto, Luís Fernando Costa and Bretas, Arturo Suman},
year = {2005},
doi = {10.1109/tcsi.2004.838543},
journal   = {IEEE Transactions on Circuits and Systems Part I : Regular Papers}
}