O’BRIEN, Myles. A set of free cross-platform authoring programs for flexible web-based CALL exercises. The EuroCALL Review, [S. l.], v. 20, n. 2, p. 59–68, 2012. DOI: 10.4995/eurocall.2012.11378. Disponível em: https://polipapers.upv.es/index.php/eurocall/article/view/11378. Acesso em: 13 may. 2026.