Huang, L., X. Liu, B. Lang, A. Yu, Y. Wang, and B. Li. “Orthogonal Weight Normalization: Solution to Optimization Over Multiple Dependent Stiefel Manifolds in Deep Neural Networks”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 32, no. 1, Apr. 2018, https://ojs.aaai.org/index.php/AAAI/article/view/11768.