Takahashi, H., T. Iwata, Y. Yamanaka, M. Yamada, and S. Yagi. “Variational Autoencoder With Implicit Optimal Priors”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 33, no. 01, July 2019, pp. 5066-73, doi:10.1609/aaai.v33i01.33015066.