Brown, K. E.,Hurst, K. M.,Arden, M. A. (2011). Improving adolescent contraceptive use: Evaluation of a theory-driven classroom-based intervention Psychology Health & Medicine, 16(2), 141-155

Stephenson, J. M.,Strange, V.,Forrest, S.,Oakley, A.,Copas, A.,Allen, E.,Babiker, A.,Black, S.,Ali, M.,Monteiro, H.,Johnson, A. M. (2004). Pupil-led sex education in England (RIPPLE study): Cluster-randomised intervention trial The Lancet, 364(9431), 338-346