?url_ver=Z39.88-2004&rft_id=10.4018%2F978-1-61350-326-3.ch009&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=A.S.&rft.au=Malik%2C+A.S.&rft.aulast=Malik&rft.date=2011&rft.btitle=Comparison+of+focus+measures+under+the+influence+of+various+factors+effecting+their+performance&rft.isbn=9781613503263&rft.genre=book