Model-Based Reinforcement Learning via Imagination with Derived Memory - Mu, Yao; Zhuang, Yuzheng; Wang, Bin; Zhu, Guangxiang; Liu, Wulong; Chen, Jianyu; Luo, Ping; Li, Shengbo; Zhang, Chongjie; Hao, Jianye (Advances in Neural Information Processing Systems, 2021)