@book{ BB05289511,
  author    = "Stillwell, John and Clarke, Martin",
  title     = "Population dynamics and projection methods",
  publisher = "Springer",
  year      = "2011",
  series    = "Understanding population trends and processes / series editor, J. Stillwell",
  number    = "v. 4",
  URL       = "https://ci.nii.ac.jp/ncid/BB05289511"
}