@book{ BA77332663,
  author    = "Piron, Claude",
  title     = "Vere aǔ fantazie : rekontaro en facila Esperanto",
  publisher = "Fonto",
  year      = "1989",
  series    = "Fonto-serio",
  number    = "n-ro 21",
  URL       = "https://ci.nii.ac.jp/ncid/BA77332663"
}