Perera, D. and Zimmermann, R. 2020. Towards Comprehensive Recommender Systems: Time-Aware Unified Recommendations Based on Listwise Ranking of Implicit Cross-Network Data. Proceedings of the AAAI Conference on Artificial Intelligence. 34, 01 (Apr. 2020), 189-197. DOI:https://doi.org/10.1609/aaai.v34i01.5350.