Shorter Notices. The Pakistan Development Review, [S. l.], v. 39, n. 3, p. pp.279–283, 2000. DOI: 10.30541/v39i3pp.279-283. Disponível em: https://www.thepdr.pk/index.php/pdr/article/view/1700. Acesso em: 6 dec. 2025.