1. A cocaína no Brasil ao longo dos últimos anos;Carlini;Rev ABP-APAL,1993
2. Cocaine-profiles, drug histories, and patterns of use of patients from Brazil;Dunn;Subst Use Misuse,1999
3. Does multisite sampling improve patient heterogeneity in drug misuse research?;Dunn;Drug Alcohol Depend,2001
4. United Nations Office for Drug Control and Crime Prevention (UNODCCP). Global illicit drug trends 200 [online]. Vienna: UNODCCP; 2001. Available from: http://www.undcp.org/adhoc/report_2001-06.
5. Cocaine problems in the coca growing countries of South America;Negrete,1992