An analysis on changes in tourism behavior due to the impact of COVID-19 using text mining - Yamagata Prefecture as an example. 2023. 20. 55-62
西平 直史. An Analysis of Tourism Information Using Text Mining Methods : A case of Yamagata city. 山形大学人文社会科学部研究年報 = Yamagata University Faculty of Humanities & Social Sciences annual research report. 2019. 16. 81-86