Xi, D. et al. 2019. Modelling of Bi-Directional Spatio-Temporal Dependence and Users’ Dynamic Preferences for Missing POI Check-In Identification. Proceedings of the AAAI Conference on Artificial Intelligence. 33, 01 (Jul. 2019), 5458–5465. DOI:https://doi.org/10.1609/aaai.v33i01.33015458.