1. Fridlund, A.J.: Human Facial Expression. An Evolutionary View. Academic Press, San Diego (1994)
2. Vrugt, A., Eechoud, M.V.: Smiling and self-presentation of men and women for job photographs. Eur. J. Soc. Psychol. 32, 419–431 (2002)
3. Oshio, A., Abe, S., Cutrone, P.: Development, reliability, and validity of the Japanese version of ten item personality inventory (TIPI-J). Jpn. J. Pers. 21(1), 40–52 (2012)
4. Yasumasa, E., Akiomi, I., Masanori, O., Hiroshi, Y.: Characteristics of people continuing regular exercise, focused on reasons for exercise: a new approach for behavioral change to promote exercise among busy workers. J. Jpn. Soc. Health Educ. Health Promot. 27(3), 256–270 (2019)
5. Kensuke, E., Jyunya, H., Kazunori, H., Keiko, M., Minoru, T., Masaki, K.: A preliminary study on university student’s attitudes towards COVID-19. Sports Bus. Manag. Rev. 31(2), 183–196 (2021)