Sun, Jiankai, and Srinivasan Parthasarathy. “Symmetrization for Embedding Directed Graphs”. Proceedings of the AAAI Conference on Artificial Intelligence 33, no. 01 (July 17, 2019): 10043-10044. Accessed October 4, 2022. https://ojs.aaai.org/index.php/AAAI/article/view/5158.