1. Epidemic of caesarean sections in Brazil;Barros;Lancet,1991 Jul 20
2. Unwanted caesarean sections among public and private patients in Brazil: Prospective study;Potter;BMJ,2001
3. Ministério da Saúde (BR), Agência Nacional de Saúde Suplementar - ANS (BR). Parto normal: Movimento ANS em favor do parto normal e da redução das cesarianas desnecessárias no setor suplementar (in Portuguese). [Natural birth: ANS movement for the promotion of natural birth and for the reduction of unnecessary cesarean sections in supplementary health services] http://www.ans.gov.br/portal/upload/biblioteca/carta_parto_normal.pdf
4. Are Brazilian women really choosing to deliver by cesarean?;Hopkins;Soc Sci Med,2000
5. Rates of caesarean section: analysis of global, regional and national estimates;Betrán;Paediatr Perinat Epidemiol