@article{CTT100840250,
  author = {Yuh Kobayashi and Hideki Takayasu and Shlomo Havlin and Misako Takayasu},
  title = {Time evolution of companies towards a stable scaling curve obtained from flow diagrams in three-dimensional phase space},
  journal = {New Journal of Physics},
  year = 2019,
}

@article{CTT100840255,
  author = {Yukie Sano and Hideki Takayasu and Misako Takayasu and Shlomo Havlin},
  title = {Identifying long-term periodic cycles and memories of collective emotion in online social media},
  journal = {PLoS ONE},
  year = 2019,
}