Zhang, W., H. Liu, Y. Liu, J. Zhou, and H. Xiong. “Semi-Supervised Hierarchical Recurrent Graph Neural Network for City-Wide Parking Availability Prediction”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 34, no. 01, Apr. 2020, pp. 1186-93, doi:10.1609/aaai.v34i01.5471.