Kuntz, A. R., Griffiths, C. M., Rankin, J. M., Armstrong, C. W., & McLoughlin, T. J.. (2006). Cortisol concentrations in human skeletal muscle tissue after phonophoresis with 10% hydrocortisone gel. Journal of athletic training, 41(3), S. 321-324. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1569565/

Kuntz, Amanda R., Christine M. Griffiths, James M. Rankin, Charles W. Armstrong, and Thomas J. McLoughlin. "Cortisol Concentrations in Human Skeletal Muscle Tissue After Phonophoresis With 10% Hydrocortisone Gel." Journal of Athletic Training 41, no. 3 (2006): S. 321-324.

Kuntz, Amanda R., et al. "Cortisol Concentrations in Human Skeletal Muscle Tissue After Phonophoresis With 10% Hydrocortisone Gel." Journal of Athletic Training 41.3 (2006): S. 321-324.