SCHUMANN, Stephan; OEPKE, Maren; EBERLE, Franz. Reference Group Effects on Learning Motivation in Mathematics and Biology in Swiss Grammar Schools. Swiss Journal of Educational Research, Bern, v. 34, n. 3, p. 575–594, 2018. DOI: 10.24452/sjer.34.3.4897. Disponível em: https://sjer.ch/article/view/4897. Acesso em: 12 mar. 2025.