@inproceedings{dong2026hierarchical,
  title = {{Hierarchical Institutions for Contract Invalidity}},
  author = {Dong, Huimin and Markovich, R{\'e}ka and van der Torre, Leendert and Yu, Liuwen},
  year = {2026},
  booktitle = {Local Proceedings of the 20th International Workshop on Juris-Informatics (JURISIN 2026)},
  pages = {108--122},
  isbn = {978-4-915905-98-8},
  address = {Gunma, Japan},
  url = {https://jurisinformaticscenter.github.io/jurisin2026/}
}