Shorter Notices. The Pakistan Development Review, [S. l.], v. 45, n. 4II, p. pp.106–110, 2007. DOI: 10.30541/v46i1pp.106-110. Disponível em: https://thepdr.pk/index.php/pdr/article/view/2174. Acesso em: 14 dec. 2025.