@article{cai2021optimal,
  title={Intelligent Traffic Light via Policy-based Deep Reinforcement Learning},
  author={Zhu, Yue and Cai, Mingyu and Chris W. Schwarz and Li, Junchao and Xiao, Shaoping},
  journal={International Journal of Intelligent Transportation Systems Research},
  year={2022},
  DOI = {https://doi.org/10.1007/s13177-022-00321-5}
  publisher={Springer}
}

Zhu, Y., Cai, M., Schwarz, C.W. et al. Intelligent Traffic Light via Policy-based Deep Reinforcement Learning. 
Int. J. ITS Res. (2022). https://doi.org/10.1007/s13177-022-00321-5