OKRAJ, Z.; MODRZEJEWSKA-ŚWIGULSKA, M. One theory – two research inspirations: A report from the research carried out with using theoretical and methodological approach of Howard E. Gruber. Nauki o Wychowaniu. Studia Interdyscyplinarne, [S. l.], v. 7, n. 2, p. 159–182, 2019. DOI: 10.18778/2450-4491.07.08. Disponível em: https://www.czasopisma.uni.lodz.pl/wychow/article/view/4510. Acesso em: 18 may. 2024.