Gemulla, R., Nijkamp, E., Haas, P. J., & Sismanis, Y. (2011). Large-scale Matrix Factorization with Distributed Stochastic Gradient Descent. In Proceedings of the 17th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining (KDD'11) (pp. 69-77). New York, NY: ACM. doi:10.1145/2020408.2020426.