20Corsi, Daniel, Melissa Neuman, Jocelyn Finlay, and S V Subramanian. "Demographic and health surveys: a profile."International journal of epidemiology 41, no. 6 (2012): 1602-1613.
28Hilber, Adriane M, Xavier Bosch-Capblanch, Christian Schindler, Lise Beck, Florence Sécula, Oran McKenzie, Sara Gari, Christina Stuckli, and Sonja Merten. Gender and immunisation.Basel, Switzerland: Swiss Centre for International Health, 2010.
33Khawaja, M, N Choueiry, and R Jurdi. "Hospital-based caesarean section in the Arab region: an overview."Eastern Mediterranean health journal= La revue de sante de la Mediterranee orientale= al-Majallah al-sihhiyah li-sharq al-mutawassit 15, no. 2 (2009): 458.
41Mathers, Colin D, Christina Bernard, Kim M Iburg, Mie Inoue, Doris Ma Fat, Kenji Shibuya, Claudia Stein, Niels Tomijima, and Hongyi Xu. "Global burden of disease in 2002: data sources, methods and results."(2003) Global Programme on Evidence for Health Policy Discussion Paper.