Balyi, I. & Hamilton, A., 2004. Long Term Athletic Development: Trainability in Childhood and Adolescence. Victoria, British Columbia: National Coaching Institute and Advanced Training and Performance LTD.
Lloyd, R. S. & Oliver, J. L., 2012. The Youth Physical Development Model: a new approach to long term athletic development. Strength and Conditioning Journal, Volume 34, pp. 37-43.