@article{article4954eb82,
title   = {On the variational mechanics with non-linear constraints},
author = {Terra, Gláucio and Kobayashi, Marcelo H},
year = {2004},
doi = {10.1016/S0021-7824(03)00069-2},
journal   = {Journal de Mathématiques Pures et Appliquées}
}