GREVSTEN , SVEN, and ERIK STÅLBERG. “Electromyographic Study of Muscular Activity in the Amputation Stump While Walking With PTB- and PTB-Suction Prosthesis”. Upsala Journal of Medical Sciences 80, no. 2 (August 1, 1975): 103-112. Accessed April 1, 2026. https://ujms.net/index.php/ujms/article/view/7371.