Cahill, Richard and Clarke, A and Keenan, Eamon and Boland, M (2003) Consequences of legislative changes to methadone prescribing in Ireland. International Journal of Drug Policy, 14, (3), pp. 241-245. https://doi.org/10.1016/S0955-3959(03)00072-0.

Cahill, Richard and O'Neil, Imelda and Barnett, Theresa and Fogerty, Catherine and McDermott, Ruth and Keenan, Eamon (1999) Substance use in school going teenagers in Kildare and west Wicklow. Dublin: Eastern Health Board.