Tucker, W. S., Campbell, B. M., Swartz, E. E., & Armstrong, C. W. (2008). Electromyography of 3 scapular muscles: A comparative analysis of the cuff link device and a standard push-up. Journal of athletic training, 43(5), S. 464-469. doi:10.4085/1062-6050-43.5.464

Tucker, W. Steven, Brian M. Campbell, Erik E. Swartz, and Charles W. Armstrong. "Electromyography of 3 Scapular Muscles: A Comparative Analysis of the Cuff Link Device and a Standard Push-up." Journal of Athletic Training 43, no. 5 (2008): S. 464-469.

Tucker, W. Steven, Brian M. Campbell, Erik E. Swartz, and Charles W. Armstrong. "Electromyography of 3 Scapular Muscles: A Comparative Analysis of the Cuff Link Device and a Standard Push-up." Journal of Athletic Training 43.5 (2008): S. 464-469.