@article{Kortlandt2010,
  author    = {Frederik H. H. Kortlandt},
  title     = {Japanese aru, iru, oru 'to be' : [oru ist bin aru]},
  journal   = {Studia Etymologica Cracoviensia},
  volume    = {2},
  pages     = {167 -- 170},
  url       = {http://www.kortlandt.nl/publications/art161e.pdf},
  year      = {2010},
}