TO, Vinh; MAHBOOB, Ahmar. Complexity of English textbook language: A systemic functional analysis. Linguistics and the Human Sciences, [S. l.], v. 13, n. 3, p. 264–293, 2019. DOI: 10.1558/lhs.31905. Disponível em: https://journal.equinoxpub.com/LHS/article/view/12681.. Acesso em: 17 sep. 2024.