@article{reinforcementlearningwithstructured1,
  title = {Reinforcement Learning with Structured Hierarchical Grammar Representations of Actions},
  author = {Petros Christodoulou and Robert Tjarko Lange and Ali Shafti and A. Aldo Faisal},
  year = {2019},
  eprint = {1910.02876},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1910.02876v2},
}