Onken, D., S. Wu Fung, X. Li, and L. Ruthotto. “OT-Flow: Fast and Accurate Continuous Normalizing Flows via Optimal Transport”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 35, no. 10, May 2021, pp. 9223-32, doi:10.1609/aaai.v35i10.17113.