Beyond Uniform Sampling: Offline Reinforcement Learning with Imbalanced Datasets - Hong, Zhang-Wei; Kumar, Aviral; Karnik, Sathwik; Bhandwaldar, Abhishek; Srivastava, Akash; Pajarinen, Joni; Laroche, Romain; Gupta, Abhishek; Agrawal, Pulkit (Advances in Neural Information Processing Systems, 2023)