Ahuja, Chaitanya, and Louis-Philippe Morency. “Lattice Recurrent Unit: Improving Convergence and Statistical Efficiency for Sequence Modeling”. Proceedings of the AAAI Conference on Artificial Intelligence 32, no. 1 (April 27, 2018). Accessed October 25, 2021. https://ojs.aaai.org/index.php/AAAI/article/view/12025.