@book{2022tomomisato3majorolddocumentsofainuandsomeproblemsin,
  title = {3 Major old documents of Ainu and some problems in the historical study of Ainu},
  author = {Tomomi Satō},
  year = {2022},
  url = {https://doi.org/10.1515/9781501502859-004}
}