Montanari, L., Guarita, B., Noor, A., Wiessing, L., Gomes, F., Hedrich, D., et al. (2012). Treatment demand indicator (TDI) : standard protocol 3.0 : guidelines for reporting data on people entering drug treatment in European countries  (European Monitoring Centre for Drugs and Drug Addiction, Ed.). Manuals, 9. Luxembourg: Publications Office of the European Union.