IEEE Communications Magazine
IEEE Communications Magazine > 2006 > 44 > 11 > 96 - 105
IEEE Communications Magazine > 2007 > 45 > 2 > 48 - 54
IEEE Communications Magazine > 2006 > 44 > 11 > 96 - 105
IEEE Communications Magazine > 2007 > 45 > 2 > 48 - 54