Nordgren Bengt, Elmeskog Alf, and Nilsson Agne. “Method for Measurement of Maximal Isometric Muscle Strength With Special Reference to the Fingers”. Upsala Journal of Medical Sciences 84, no. 2 (June 1, 1979): 188-194. Accessed May 3, 2024. https://ujms.net/index.php/ujms/article/view/7217.