"Shimpei Okuda,Michio Hosaka,Kazutoshi Sasahara","Detecting directional forces in the evolution of grammar: A case study of the English perfect with intransitives across EEBO, COHA, and Google Books",,"Humanities and Social Sciences Communications","Springer Nature","Vol. 10","No. 285",,2023,June
"保坂道雄,奥田慎平,笹原和俊","ことばの変化と進化―英語の完了構文の盛衰をめぐって",,"歴史言語学","日本歴史言語学会",,"No. 9","pp. 107-117",2020,Dec.
"奥田慎平,保坂道雄,笹原和俊","大規模複数コーパスを用いた言語の文化進化の定量化","2020年度人工知能学会全国大会（第34回）",,,,,,2020,June
"Michio Hosaka,Shimpei Okuda,Kazutoshi Sasahara","Evolutionary Forces in the Development of the English Perfect Construction","The Evolution of Language: Proceedings of the 13th International Conference (EvoLang13)",,,,,,2020,Apr.
"Michio Hosaka,Shimpei Okuda,Kazutoshi Sasahara","Development of the English Perfect Construction",,"The Evolution of Language: Proceedings of the 13th International Conference (EvoLang13)",,,,,2020,Apr.