@misc{kas-16-aa-nitsui,
  author = {Masahide Kashiwagi},
  title = {About Affine Arithmetic},
  year = 2016,
  note = {In Japanese.},
  url = {http://verifiedby.me/kv/affine/affine.pdf},
  howpublished = {Online document},
  pages = {15},
  comment = {To check. Considers the H{\'e}non map.}
}