Egwu, O. A., C. I. P. Anibeze, F. C. Akpuaka, and B. E. Udoh. “Activity Related Differences in the Thickness of Achilles Tendon Among Four Different Occupational Groups in Nigeria: An Ultrasound Based Study”. Bangladesh Journal of Medical Science, vol. 11, no. 2, July 2012, pp. 103-11, doi:10.3329/bjms.v11i2.9666.