Jain, A., G. Patil, A. Jain, K. Khetarpal, and D. Precup. “Variance Penalized On-Policy and Off-Policy Actor-Critic”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 35, no. 9, May 2021, pp. 7899-07, doi:10.1609/aaai.v35i9.16964.