?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Marsden%2C+J&rft.aufirst=J&rft.aulast=Marsden&rft.issn=0966-6362&rft.date=February+2012&rft.volume=35&rft.issue=2&rft.atitle=Muscle+paresis+and+passive+stiffness%3A+key+determinants+in+limiting+function+in+Hereditary+and+Sporadic+Spastic+Paraparesis.&rft.title=Gait+%26+Posture&rft.pages=266+-+271&rft.genre=article