LUTKOVSKAYA, O. VIANA FITNESS SYSTEMS ON THE FORMATION OF MOTIVATION TO PHYSICAL CULTURE LESSONS AT SCHOOL-AGE CHILDREN. Vestnik of Polotsk State University. Part E. Pedagogic Sciences, [S. l.], n. 7, p. 249-253, 2017. Disponível em: https://journals.psu.by/pedagogical/article/view/3078. Acesso em: 19 may. 2024.