Li, Shengxi, Zeyang Yu, Min Xiang, and Danilo Mandic. “Solving General Elliptical Mixture Models through an Approximate Wasserstein Manifold”. Proceedings of the AAAI Conference on Artificial Intelligence 34, no. 04 (April 3, 2020): 4658-4666. Accessed April 17, 2021. https://ojs.aaai.org/index.php/AAAI/article/view/5897.