?url_ver=Z39.88-2004&rft_id=10.1109%2FICET.2011.6048455&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=M.&rft.au=Khan%2C+M.&rft.aulast=Khan&rft.date=2011&rft.title=Classification+of+usability+issues+for+haptic+systems&rft.isbn=9781457707698&rft.genre=proceeding