LAFLEUR, L. The indirect spaced repetition concept. Vocabulary Learning and Instruction, [S. l.], v. 9, n. 2, p. 9–16, 2020. DOI: 10.7820/vli.v09.2.lafleur. Disponível em: https://www.castledown.com/journals/vli/article/view/vli.v09.2.lafleur. Acesso em: 15 sep. 2026.