Sex Differentials in Mortality: A Corollary of Son Preference?. The Pakistan Development Review, [S. l.], v. 26, n. 4, p. pp.555–568, 1987. DOI: 10.30541/v26i4pp.555-568. Disponível em: https://thepdr.pk/index.php/pdr/article/view/792. Acesso em: 28 oct. 2025.