NAUMOV, Valery. Propensity to additions in service persons: an experience of historical research. Journal of Education, Health and Sport, [S. l.], v. 6, n. 11, p. 941–954, 2016. Disponível em: https://apcz.umk.pl/JEHS/article/view/5701. Acesso em: 29 jun. 2025.