Helfrich, Kyle, and Qiang Ye. “Eigenvalue Normalized Recurrent Neural Networks for Short Term Memory”. Proceedings of the AAAI Conference on Artificial Intelligence 34, no. 04 (April 3, 2020): 4115-4122. Accessed August 7, 2022. https://ojs.aaai.org/index.php/AAAI/article/view/5831.