GRES, O.; IONOVA, E.; PARTOLA, V. Organization of Health-preserving Activities of the Headmasters of General Educational Institutions. Forum Pedagogiczne, [S. l.], v. 8, n. 1, p. 287–296, 2018. DOI: 10.21697/fp.2018.1.19. Disponível em: https://czasopisma.uksw.edu.pl/index.php/fp/article/view/2347. Acesso em: 25 kwi. 2024.