NUNO CARLOS LEITÃO. The impact of immigration on Portuguese Intra-Industry Trade. European Economic Letters (EEL), [S. l.], v. 2, n. 1, p. 7–11, 2022. DOI: 10.52783/eel.v2i1.7. Disponível em: https://eelet.org.uk/index.php/journal/article/view/7. Acesso em: 22 oct. 2025.