Park, Kyoung-Seon, Sung-Hi An, Hyunmyung Kim, Chang-Hyeon Joh, and Wonho Suh. 2016. “Spatial Analysis of Subway Ridership: Rainfall and Ridership”. Proceedings of Engineering and Technology Innovation 4 (October), 1-3. https://doi.org/10.46604/peti.2016.241.