@inproceedings{inproceedingsfde17b84,
title   = {Direct methods for transient stability analysis in power systems: state of art and future perspectives},
author = {Alberto, Luís Fernando Costa and Silva, Flávio Henrique Justiniano Ribeiro da and Bretas, Newton Geraldo},
year = {2001},
publisher = {IEEE/INESC/FEUP},
booktitle   = {IEEE Porto Power Tech Conference}
}