@inbook{inbook2cad7e01,
title   = {Multiple-scale technique applied to the evaluation of non-linear normal modes},
author = {Mazzilli, Carlos Eduardo Nigro and Soares, Mário Eduardo Senatore and Baracho Neto, Odulpho Goyana de Paiva},
year = {2002},
publisher = {American Academy of Mechanics, Associação Brasileira de Ciências Mecânicas},
journal   = {Nonlinear dynamics, chaos, control and their applications to engineering sciences, v.5}
}