?url_ver=Z39.88-2004&rft_id=10.1109%2FICIAS.2007.4658560&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=S.&rft.aulast=Ahmed&rft.au=Ahmed%2C+S.&rft.isbn=1424413559%3B+9781424413553&rft.title=Observer+based+feedback+control+strategies+for+collaborative+robots&rft.date=2007&rft.genre=proceeding