HEIFT, Trude. Multiple Learner Errors and Meaningful Feedback: A Challenge for ICALL Systems. CALICO Journal, [S. l.], v. 20, n. 3, p. 533–548, 2013. DOI: 10.1558/cj.v20i3.533-548. Disponível em: https://journal.equinoxpub.com/Calico/article/view/17072.. Acesso em: 14 aug. 2024.