@book{2022sato3majorolddocumentsainu,
  title = {3 Major old documents of Ainu and some problems in the historical study of Ainu},
  author = {佐藤 知己},
  year = {2022},
  doi = {10.1515/9781501502859-004},
  language = {ain},
  url = {https://doi.org/10.1515/9781501502859-004}
}