IEEE Communications Magazine
IEEE Communications Magazine > 2006 > 44 > 3 > 142 - 149
IEEE Communications Magazine > 2007 > 45 > 4 > 26 - 31
IEEE Communications Magazine > 2006 > 44 > 3 > 142 - 149
IEEE Communications Magazine > 2007 > 45 > 4 > 26 - 31