@article{covariantcontravariantrefinementmodalm,
  title = {Covariant-Contravariant Refinement Modal $μ$-calculus},
  author = {Huili Xing},
  year = {2022},
  eprint = {2208.02989},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2208.02989v1},
}