N. Viriyatharakij, S. Supjareonkul, S. Sirimusika, W. Tangwongvarn, and S. Pitakpol, “Effects of Active Scapular Retraction during Shoulder Flexion 60 Degree on Pectoralis Minor Muscle Length and Forward Shoulder Angle”, J Med Health Sci, vol. 22, no. 1, pp. 4–10, Jun. 2015.