Shorter Notices. The Pakistan Development Review, [S. l.], v. 49, n. 1, p. pp.81–86, 2010. DOI: 10.30541/v49i1pp.81-86. Disponível em: https://www.thepdr.pk/index.php/pdr/article/view/2385. Acesso em: 6 dec. 2025.