BOULKROUN, Fouad. Preemptive and Reactive Focus-on-Form Instruction: Effect on learning parallel grammatical structures. Journal of Human Sciences , Constantine, Algeria, v. 27, n. 3, p. 145–167, 2016. Disponível em: http://conferences.umc.edu.dz/h/article/view/2402. Acesso em: 13 feb. 2026.