3.
Betrán, A.P., Gulmezoglu, A.M., Robson, M., Merialdi, M., Souza, J.P., Wojdyla, D., Widmer, M., Carroli, G., Torloni, M.R., Langer, A., Narváez, A., Velasco, A., Faúndes, A., Acosta, A., Valladares, E., Romero, M., Zavaleta, N., Reynoso, S., & Bataglia, V. (2009). WHO global survey on maternal and perinatal health in Latin America: classifying caesarean sections. Reproductive Health, 6, 18.
https://doi.org/10.1186/1742-4....