@article{articlede9018fe,
title   = {Required damping to assure multiswing transient stability: the SMIB case},
author = {Alberto, Luís Fernando Costa and Bretas, Newton Geraldo},
year = {2000},
doi = {10.1016/s0142-0615(99)00050-2},
journal   = {International Journal of Electrical Power & Energy Systems}
}