@inproceedings{bt2012necessary,
title={Necessary conditions for multiobjective optimal control problems with state constraints},
author={BT Kien, Ngai-Ching Wong, and Jen-Chih Yao},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020212049989842256},
booktitle={Dynamics of Continuous, Discrete & Impulsive Systems, Series B: Applications & Algorithms},
volume={19},
pages={9},
year={2012},
}
BT Kien, Ngai-Ching Wong, and Jen-Chih Yao. Necessary conditions for multiobjective optimal control problems with state constraints. 2012. Vol. 19. In Dynamics of Continuous, Discrete & Impulsive Systems, Series B: Applications & Algorithms. pp.9. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020212049989842256.