Some Refinements of the Semi-Input-Output Method. The Pakistan Development Review, [S. l.], v. 6, n. 2, p. pp.243–247, 2022. DOI: 10.30541/v6i2pp.243-247. Disponível em: https://thepdr.pk/index.php/pdr/article/view/147. Acesso em: 8 jun. 2025.