@book{1993vovinreconstructionprotoainuphonology,
  title = {Reconstruction of Proto-Ainu Phonology},
  author = {Alexander Vovin},
  year = {1993},
  doi = {10.1163/9789004644823\_005},
  language = {ain},
  url = {https://doi.org/10.1163/9789004644823\_005}
}