OTHMAN, S. Tense-Aspect Selection In Biochemistry Texts A Semantic-Grammatical Study. اداب الرافدین, [S. l.], v. 38, n. 49, p. 41–72, 2008. DOI: 10.33899/radab.2008.33508. Disponível em: https://radab.uomosul.edu.iq/index.php/radab/article/view/33684. Acesso em: 11 dec. 2025.