نظرية جوتلوب فريجه المنطقية. Al-Adab Journal, [S. l.], v. 9, n. 9, p. 195–222, 2021. DOI: 10.31973/aj.v9i9.1964. Disponível em: https://aladabj.uobaghdad.edu.iq/index.php/aladabjournal/article/view/1964.. Acesso em: 3 jul. 2024.