論文（英文）
Kuwabara M, Oba K, Takano N, Nagamine N, Maruyama Y, Ito N, Watanabe I, Ikeda C, Sakamoto J. An exploratory questionnaire survey about overwork on mental health of Japanese elementary and junior high school teachers. J Ment Health Train Educ Pract 2021.
Kuwabara M, Oba K, Takano N, Nagamine N, Maruyama Y, Ito N, Watanabe I, Ikeda C, Sakamoto J. An exploratory questionnaire survey about overwork on mental health of Japanese elementary and junior high school teachers. J Ment Health Train Educ Pract 2021. https://doi.org/10.1108/JMHTEP-01-2020-0002