LÜDI, Georges Lüdi. Requirement for innovation and research in language education in Switzerland. Swiss Journal of Educational Research, Bern, v. 26, n. 3, p. 477–488, 2004. DOI: 10.24452/sjer.26.3.4691. Disponível em: https://sjer.ch/article/view/4691. Acesso em: 13 mar. 2025.