@inproceedings{songting2011an,
title={An adjoint state method for numerical approximation of continuous traffic congestion equilibria},
author={Songting Luo, Shing-Yu Leung, and Jianliang Qian},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221112838874118751},
booktitle={Communications in Computational Physics},
volume={10},
number={5},
pages={1113-1131},
year={2011},
}

Songting Luo, Shing-Yu Leung, and Jianliang Qian. An adjoint state method for numerical approximation of continuous traffic congestion equilibria. 2011. Vol. 10. In Communications in Computational Physics. pp.1113-1131. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221112838874118751.