Barrio, Gregorio and Montanari, Linda and Bravo, Maria and Guarita, Bruno and de La Fuente, Luis and Pulido, Jose and Vicente, Julian (2013) Trends of heroin use and heroin injection epidemics in Europe: findings from the EMCDDA treatment demand indicator (TDI). Journal of Substance Abuse Treatment, 45, (1), pp. 19-30. doi: 10.1016/j.jsat.2012.11.002.

Sarasa-Renedo, Ana and Barrio, Gregorio and Montanari, Linda and Guarita, Bruno and de La Fuente, Luis and Bravo, Maria Jose and Vicente, Julian (2015) Estimating trends in injecting drug use in Europe using national data on drug treatment admissions. Lisbon: European Monitoring Centre for Drugs and Drug Addiction.