F. Torres, G. Calvo, and C. Pontes. Medicina clínica, (December 2005)4826<m:linebreak></m:linebreak>JID: 0376377; ppublish;<m:linebreak></m:linebreak>Disseny; Regulació.
K. Sainani. PM & R : the journal of injury, function, and rehabilitation, 1 (12):
1098-103(December 2009)5645<m:linebreak></m:linebreak>JID: 101491319; 2009/10/09 received; 2009/10/09 accepted; ppublish;<m:linebreak></m:linebreak>Comparacions múltiples.