Strahl, Jonathan, Jaakko Peltonen, Hirsohi Mamitsuka, and Samuel Kaski. 2020. “Scalable Probabilistic Matrix Factorization With Graph-Based Priors”. Proceedings of the AAAI Conference on Artificial Intelligence 34 (04):5851-58. https://doi.org/10.1609/aaai.v34i04.6043.