DePino, G. M. ., Webright, W. G., & Arnold, B. L. (2000). Duration of maintained hamstring flexibility after cessation of an acute static stretching protocol. Journal of athletic training, 35(1), S. 56-59. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1323439/?page=1

DePino, Glen M. , William G. Webright, and Brent L. Arnold. "Duration of Maintained Hamstring Flexibility After Cessation of an Acute Static Stretching Protocol." Journal of Athletic Training 35, no. 1 (2000): S. 56-59.

DePino, Glen M. , William G. Webright, and Brent L. Arnold. "Duration of Maintained Hamstring Flexibility After Cessation of an Acute Static Stretching Protocol." Journal of Athletic Training 35.1 (2000): S. 56-59.