Ali Sallı, et al. “Relationship Between Handgrip Strength and Isokinetic Shoulder Abduction-Adduction Muscle Strength in Primer Fibromyalgia”. Archives of Rheumatology, vol. 23, no. 1, Mar. 2008, pp. 005-8, https://www.archivesofrheumatology.org/index.php/pub/article/view/236.