"Yuh Kobayashi,Hideki Takayasu,Shlomo Havlin,Misako Takayasu","Time evolution of companies towards a stable scaling curve obtained from flow diagrams in three-dimensional phase space",,"New Journal of Physics",,"Vol. 21",,"  043038",2019,Apr.
"Yukie Sano,Hideki Takayasu,Misako Takayasu,Shlomo Havlin","Identifying long-term periodic cycles and memories of collective emotion in online social media",,"PLoS ONE",,"Vol. 14","no. 3","  e0213843",2019,Mar.