@article{articlefe0ff13c,
title   = {Stability and Hopf bifurcation in an hexagonal governor system},
author = {Sotomayor, Jorge and Mello, Luiz Fernando and Braga, Denis de Carvalho},
year = {2008},
doi = {10.1016/j.nonrwa.2007.01.007},
journal   = {Nonlinear Analysis - Real World Applications}
}