?url_ver=Z39.88-2004&rft_id=10.1109%2FICIAS.2007.4658566&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Yusoff&rft.au=Yusoff%2C+M.Z.&rft.aufirst=M.Z.&rft.isbn=1424413559%3B+9781424413553&rft.title=Estimation+of+visual+evoked+potentials+using+a+signal+subspace+approach&rft.date=2007&rft.genre=proceeding