1. Concepts of physical fitness (with laboratories);Corbin, C.B.; Lindsey, R.
2. Flexibility: how to understand it, how to achieve it;P, McNaught Davis,1991
3. Science of stretching;Alter, M.J.,1988
4. The eVect of time on static stretch on the flexibility of the hamstring muscles;Bandy, W.D.; Irion, J.M.;Phys Ther,1994
5. Scientific, medical and practical aspects of stretching;Anderson, B.; Burke, E.R.;Clin Sports Med,1991