1. J. Birdwell, J. Chapman and N. Singleton (2011) Taking Drugs Seriously: a demos and UK Drug Policy Commission report on legal highs. London, demos.
2. M. Bryan, E. D. Bono and S. Pudney (2012). Licensing and regulation of the cannabis market in England and Wales: Towards a cost-benefit analysis. Colchester Essex, Institute for Social and Economic Research, University of Essex.
3. R. Burton, F. Thomson, C. Visintin and C. Wright (2014) United Kingdom drug situation: Annual report to the European Monitoring Centre for Drugs and Drug Addiction. London, Public Health England.
4. C. Crawford, S. Lombardo, F. Thomson, C. Visintin and C. Wright (2016) United Kingdom drug situation: Focal Point Annual report 2015. London, United Kingdom Focal Point at Public Health England.
5. J. Csete, A. Kamarulzam, M. Kazatchkine, F. Altice, M. Balicki, J. Buxton, J. Cepeda, M. Comfort, E. Goosby, J. Goulão, C. Hart, T. Kerr, A.M. Lajous, S. Lewis, N. Martin, D. Mejía, A. Camacho, D. Mathieson, L. Obot, A. Ogunrombi, S. Sherman, J. Stone, N. Vallath, P. Vickerman, T. Zábransky and C. Beyrer (2016) ‘Public health and international drug policy’. The Lancet, The Lancet Commissions, 1–54.