Ichikawa 2020 Ichikawa, Tomomi (2020-03-25). "若年女性における排便状況と食事からの発酵食品摂取の関係" [A Study of the Relationship between Constipation Assessment and the Intake of Fermented Foods in the Diet of Young Women]. Journal of the Faculty of Human Life Studies (in Japanese). 7: 17–21. Archived from the original on 2021-08-05. Retrieved 2020-10-03.
Ichikawa 2020 Ichikawa, Tomomi (2020-03-25). "若年女性における排便状況と食事からの発酵食品摂取の関係" [A Study of the Relationship between Constipation Assessment and the Intake of Fermented Foods in the Diet of Young Women]. Journal of the Faculty of Human Life Studies (in Japanese). 7: 17–21. Archived from the original on 2021-08-05. Retrieved 2020-10-03.