@inproceedings{inproceedings136c82a9,
title   = {Optimal power flow solution using the penalty/modified barrier method},
author = {Lage, Guilherme Guimarães and Sousa, Vanusa Alves de and Costa, Geraldo Roberto Martins da},
year = {2009},
publisher = {IEEE},
booktitle   = {IEEE Bucharest PowerTech Conference}
}