N. KALU-UMEH, Nnennaya; N. SAMBO, Mohammed N. Sambo; H. IDRIS, Suleiman; M. KURFI​, Abubakar. Costs and Patterns of Financing Maternal Health Care Services in Rural Communities in Northern Nigeria: Evidence for Designing National Fee Exemption Policy. International Journal of Maternal and Child Health and AIDS, [S. l.], v. 2, n. 1, p. 163–172, 2015. DOI: 10.21106/ijma.21. Disponível em: http://www.mchandaids.org/index.php/ijma/article/view/311. Acesso em: 19 oct. 2026.