MUELLER, K.; HAYS, G. Vocabulary learning outside of the classroom: Institutional use of a spaced repetition. Vocabulary Learning and Instruction, [S. l.], v. 11, n. 2, p. 48–56, 2022. DOI: 10.7820/vli.v11.2.mueller. Disponível em: https://www.castledown.com/journals/vli/article/view/vli.v11.2.mueller. Acesso em: 15 sep. 2026.