@article{article3870765f,
title   = {The structure of chaotic magnetic field lines in a Tokamak with external nonsymmetric magnetic perturbations},
author = {Silva, Elton Cesar da and Caldas, Iberê Luiz and Viana, Ricardo Luiz},
year = {2001},
doi = {10.1109/27.940957},
journal   = {IEEE Transactions on Plasma Science}
}