Khalifa, Ahmed, Philip Bontrager, Sam Earle, and Julian Togelius. “PCGRL: Procedural Content Generation via Reinforcement Learning”. Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment 16, no. 1 (October 1, 2020): 95-101. Accessed October 15, 2021. https://ojs.aaai.org/index.php/AIIDE/article/view/7416.