McIntosh, A.S. and McCrory, P. (2005) Preventing head and neck injury. British Journal of Sports Medicine 39, 314-318.

International Rugby Board. (2005) Laws of the game Rugby Union. Law 20 Scrum, Dublin, International Rugby Board. 101-105.

Fuller, C.W., Brooks, J.H., Cancea, R.J., Hall, J. and Kemp, S.P. (2007) Contact events in rugby union and their propensity to cause injury. British Journal of Sports Medicine 41, 862-867.

Fuller, C.W., Laborde, F., Leather, R.J. and Molloy, M.G. (2008) International Rugby Board World Cup 2007 injury surveillance study. British Journal of Sports Medicine 42,452-459.

Gianotti, S.M., Hume, P.A., Hopkins, W.G., Harawira, J. and Truman, R. (2008) Interim evaluation of the effect of a new scrum law on neck and back injuries in rugby union. British Journal of Sports Medicine 42, 427-430.

Quarrie, K.L., Gianotti, S.M., Hopkins, W.G. and Hume, P.A. (2007) Effect of nationwide programme on serious spinal injuries in New Zealand rugby union: ecological study. British Medical Journal 334, 1150.