@article{NakagawaJoppGondoetal.2018,
  author    = {Takeshi Nakagawa and Daniela Jopp and Yasuyuki Gondo and Jonathan Lehrfeld and Christoph Rott and Frank Oswald},
  title     = {Valuation of life among old and very old adults : comparison between Germany and Japan},
  journal   = {Innovation in Aging},
  volume    = {2},
  number    = {2, igy020},
  pages     = {1 -- 10},
  doi       = {10.1093/geroni/igy020},
  year      = {2018},
}