Wakefield, C. B., Halls, A., Difilippo, N., & Cottrell, G. T. (2015). Reliability of goniometric and trigonometric techniques for measuring hip-extension range of motion using the modified Thomas Test. Journal of athletic training, 50(5), S. 460-466. doi:http://dx.doi.org/10.4085/1062-6050-50.2.05

Wakefield, Charles Brent, Amanda Halls, Nicole Difilippo, and G. Trevor Cottrell. "Reliability of Goniometric and Trigonometric Techniques for Measuring Hip-extension Range of Motion Using the Modified Thomas Test." Journal of Athletic Training 50, no. 5 (2015): S. 460-466.

Wakefield, Charles Brent, Amanda Halls, Nicole Difilippo, and G. Trevor Cottrell. "Reliability of Goniometric and Trigonometric Techniques for Measuring Hip-extension Range of Motion Using the Modified Thomas Test." Journal of Athletic Training 50.5 (2015): S. 460-466.