1. National Treatment Agency for Substance Misuse Numbers in Treatment, Drug Treatment Activity 2007/8. NTA.
2. Newcombe R: The reduction of drug related harm: a conceptual framework for theory, practice and research. The reduction of drug related harm. Edited by: O'Hare PA, Newcombe R, Matthews A, Buning EC, Drucker E. 1992, London Routledge
3. Ritter , Cameron : A review of the efficacy and effectiveness of harm reduction strategies for alcohol, tobacco and illicit. Drug & Alcohol Review. 2006, 25 (6): 611-24. 10.1080/09595230600944529.
4. International Harm Reduction Association: What is Harm Reduction?. 2006, http://www.ihra.net/Whatisharmreduction
5. Stimson G: Aids and injecting drug users in the UK 1987-1993, the policy response to an epidemic. Social Science and Medicine. 1995, 41 (5): 699-716. 10.1016/0277-9536(94)00435-V.