@book{ BA89817841,
  author    = "Matasović, Ranko",
  title     = "Etymological dictionary of proto-Celtic",
  publisher = "Brill",
  year      = "2009",
  series    = "Leiden Indo-European etymological dictionary series",
  number    = "v. 9",
  URL       = "http://ci.nii.ac.jp/ncid/BA89817841"
}