@Article{I.Washitani:2020,
  author = {I. Washitani, M. Nagai, M. Yasukawa, and M. Kitsuregawa},
  title = {Testing a butterfly commonness hypothesis with data assembled by a citizen science program “Tokyo Butterfly Monitoring”},
  booktitle = {Ecological Research},
  year      = {2020},
  publisher = {日本生態学会},
  pages     = {https://doi.org/10.1111/1440-1703.12161},
}