National Strength and Conditioning Association position statement on long-term athletic development (2016),

Lloyd, R.S., Cronin, J.B., Faigenbaum, A.D., Haff, G.G., Howard, R., Kraemer, W.J., Micheli, L.J., Myer, G.D. and Oliver, J.L., (2016). National Strength and Conditioning Association position statement on long-term athletic development. Journal of Strength and Conditioning Research, 30(6), pp.1491-1509.