Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) "福島, 直恭 and Fukushima, Naoyasu",A Study of the Change in Written Language in Modern Japanese Society,Bulletin of Gakushuin Women's College,13447378,学習院女子大学,2018-03,,20,109-124,https://cir.nii.ac.jp/crid/1050571658774569728,