IEEE Communications Magazine
IEEE Communications Magazine > 2007 > 45 > 9 > 134 - 143
IEEE Communications Magazine > 2008 > 46 > 4 > 134 - 141
IEEE Communications Magazine > 2007 > 45 > 9 > 134 - 143
IEEE Communications Magazine > 2008 > 46 > 4 > 134 - 141