European Monitoring Centre for Drugs and Drug Addiction. Fountain, Jane and Rhodes, Tim and Barnard, Marina and Hariga, Fabienne and Avilés, Nuria Romo and Vicente, Julian and Weber, Urban (2001) Injecting drug use, risk behaviour and qualitative research in the time of AIDS. EMCDDA Insights Series no. 4 Luxembourg: Office for Official Publications of the European Communities.

Belgian Information Reitox Network. Hariga, Fabienne and Leurquin, P and Bils, L and Kottgen, S and Laudens, F and Vanderveken, M (2000) Belgian national report on drugs 2000. Brussels: Scientific Institute of Public Health.