Mutti, Mirco, Lorenzo Pratissoli, and Marcello Restelli. 2021. “Task-Agnostic Exploration via Policy Gradient of a Non-Parametric State Entropy Estimate”. Proceedings of the AAAI Conference on Artificial Intelligence 35 (10):9028-36. https://ojs.aaai.org/index.php/AAAI/article/view/17091.