@inproceedings{inproceedingsa48837ae,
title   = {On the non ideal dynamics of a nonlinear portal frame},
author = {Brasil, Reyolando Manoel Lopes Rebello da Fonseca and Balthazar, José Manoel and Mook, Dean T},
year = {1999},
publisher = {Virginia Tech},
booktitle   = {ASME Mechanics & Materials Conference}
}