Theeven, P. J. R., Hemmen, B., Rings, F., Meys, G. H., Brink, P. R., Smeets, R. J. and Seelen, H. A. (2011) “Functional added value of microprocessor-controlled knee joints in daily life performance of Medicare Functional Classification Level-2 amputees”., Journal of Rehabilitation Medicine, 43(10), pp. 906–915. doi: 10.2340/16501977-0861.