KRIEGER, W. A. First Draft of a superimposed concept for the categorization of prosthetic knee units incorporating stance phase control mechanisms for the purposes of structural testing. ISO/TC168/WG3 第25回委員会資料. 1996
FISHER, L. D. Bouncy knee : a stance phase flex-extend knee unit. P. O. Int. 1985, 9, 3, 129-136