@book{1998kirstenrefsingoriginsoftheainulanguagetheainuindoeuropea,
  title = {Origins of the Ainu language : the Ainu Indo-European controversy},
  author = {Kirsten Refsing},
  year = {1998},
  language = {ain},
  url = {http://ci.nii.ac.jp/ncid/BA34315549}
}