@article{article51636837,
title   = {Stability boundary characterization of nonlinear autonomous dynamical systems in the presence of a supercritical Hopf equilibrium point},
author = {Gouveia Júnior, Josaphat Ricardo Ribeiro},
year = {2013},
doi = {10.1142/S0218127413501964},
journal   = {International Journal of Bifurcation and Chaos}
}