@inproceedings{inproceedingsdd76dc75,
title   = {An extended energy function for voltage and transient stability analysis considering voltage dependent active loads},
author = {Guedes, Renato Braga de Lima and Silva, Flávio Henrique Justiniano Ribeiro da and Alberto, Luís Fernando Costa and Bretas, Newton Geraldo},
year = {2005},
publisher = {IEEE/PES},
booktitle   = {IEEE St. Petersburg PowerTech Conference}
}