@book{ BB12707950,
  author    = "Koivumaa, Mikko",
  title     = "フィンランド流イクメンMIKKOの世界一しあわせな子育て",
  publisher = "かまくら春秋社",
  year      = "2013",
  URL       = "https://ci.nii.ac.jp/ncid/BB12707950"
}