OREŠNIK, Janez. Natural Syntax: The English indefinite article. Studia Anglica Posnaniensia, [S. l.], v. 46, n. 4, p. 41–71, 2012. DOI: 10.2478/v10121-010-0011-8. Disponível em: https://pressto.amu.edu.pl/index.php/stap/article/view/v10121-010-0011-8. Acesso em: 19 jan. 2026.