Stone, J. A., Partin, N. B., Luecken, J. S., Timm, K. E., & Ryan, E. J. (1994). Upper extremity proprioceptive training. Journal of athletic training, 29(1), S. 15-18. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1317754/pdf/jathtrain00025-0017.pdf

Stone, Jennifer A., Nina B. Partin, Joseph S. Luecken, Kent E. Timm, and Edward J. Ryan. "Upper Extremity Proprioceptive Training." Journal of Athletic Training 29, no. 1 (1994): S. 15-18.

Stone, Jennifer A., et al. "Upper Extremity Proprioceptive Training." Journal of Athletic Training 29.1 (1994): S. 15-18.