Arzish Ilyas, Ashfaq Ahmad, Syed Amir Gillani, Bazal Bukhari, and Humna Gillani. “The Validity and Reliability of a Sphygmomanometer in Assessing Isometric Muscle Strength of Shoulder Flexors and Abductors”. Annals of King Edward Medical University, vol. 25, no. 4, Dec. 2019, https://annalskemu.org/journal/index.php/annals/article/view/3120.