E. Weiderpass, F. C. Barros, C. G. Victora, E. Tomasi, and R. Halpern, “ Incidence and duration of breast-feeding by pattern of delivery: a longitudinal study in Southeastern Brazil ”, Rev. saúde pública, vol. 32, no. 3, pp. 225–231, Jun. 1998, doi: 10.1590/S0034-89101998000300004.