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Kelly, Alan and Carvalho, Marlen and Teljeur, Conor (2003) A 3-source capture recapture study of the prevalence of opiate use in Ireland 2000 to 2001: key findings summary tables. Dublin: Department of Community Health & General Practice, Trinity College Dublin.

National Advisory Committee on Drugs, Trinity College Dublin. Department of Community Health and General Practice. Small Area Research Unit. Kelly, Alan and Carvalho, Marlen and Teljeur, Conor (2003) Prevalence of opiate use in Ireland 2000-2001: a 3-source capture recapture study. Dublin: National Advisory Committee on Drugs.