@article{2013tjeerddegraafdocumentationandrevitalizationoftwoendangered,
  title = {Documentation and Revitalization of Two Endangered Languages in Eastern Asia: Nivkh and Ainu},
  author = {Tjeerd de Graaf and 白石 英才},
  year = {2013},
  journal = {Data Archiving and Networked Services (DANS)},
  language = {ain},
  url = {https://pure.knaw.nl/portal/en/publications/4e00e3c3-d606-486f-a9fb-909b231d9c3b}
}