Hogan, Margaret C; Foreman, Kyle J; Naghavi, Mohsen; Ahn, Stephanie Y; Wang, Mengru; Makela, Susanna M; Lopez, Alan D; Lozano, Rafael; Murray, Christopher JL (2010). "Maternal mortality for 181 countries, 1980–2008: A systematic analysis of progress towards Millennium Development Goal 5". The Lancet. 375 (9726): 1609–23. doi:10.1016/S0140-6736(10)60518-1. PMID20382417. S2CID22820420.
Hogan, Margaret C; Foreman, Kyle J; Naghavi, Mohsen; Ahn, Stephanie Y; Wang, Mengru; Makela, Susanna M; Lopez, Alan D; Lozano, Rafael; Murray, Christopher JL (2010). "Maternal mortality for 181 countries, 1980–2008: A systematic analysis of progress towards Millennium Development Goal 5". The Lancet. 375 (9726): 1609–23. doi:10.1016/S0140-6736(10)60518-1. PMID20382417. S2CID22820420.
Hogan, Margaret C; Foreman, Kyle J; Naghavi, Mohsen; Ahn, Stephanie Y; Wang, Mengru; Makela, Susanna M; Lopez, Alan D; Lozano, Rafael; Murray, Christopher JL (2010). "Maternal mortality for 181 countries, 1980–2008: A systematic analysis of progress towards Millennium Development Goal 5". The Lancet. 375 (9726): 1609–23. doi:10.1016/S0140-6736(10)60518-1. PMID20382417. S2CID22820420.