Shorter Notices. The Pakistan Development Review, [S. l.], v. 47, n. 1, p. pp.125–128, 2008. DOI: 10.30541/v47i1pp.125-128. Disponível em: https://www.thepdr.pk/index.php/pdr/article/view/2254. Acesso em: 6 dec. 2025.