Shorter Notices. The Pakistan Development Review, [S. l.], v. 39, n. 1, p. pp.82–87, 2000. DOI: 10.30541/v39i1pp.82-87. Disponível em: https://www.thepdr.pk/index.php/pdr/article/view/1682. Acesso em: 6 dec. 2025.