Riemann, B. L., & Guskiewicz, K. M. (2000). Effects of mild head injury on postural stability as measured through clinical balance testing. Journal of athletic training, 35(1), S. 19-25. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1323433/?page=1

Riemann, Bryan L., and Kevin M. Guskiewicz. "Effects of Mild Head Injury On Postural Stability As Measured Through Clinical Balance Testing." Journal of Athletic Training 35, no. 1 (2000): S. 19-25.

Riemann, Bryan L., and Kevin M. Guskiewicz. "Effects of Mild Head Injury On Postural Stability As Measured Through Clinical Balance Testing." Journal of Athletic Training 35.1 (2000): S. 19-25.