SARKAR, S. Parental investment in child immunisation: the role of birth order and number of children. International Journal Of Community Medicine And Public Health, [S. l.], v. 13, n. 7, p. 3443–3450, 2026. DOI: 10.18203/2394-6040.ijcmph20261842. Disponível em: https://www.ijcmph.com/index.php/ijcmph/article/view/16010. Acesso em: 8 aug. 2026.