IEEE Communications Magazine
IEEE Communications Magazine > 2007 > 45 > 9 > 100 - 104
IEEE Communications Magazine > 2007 > 45 > 12 > 84 - 91
IEEE Communications Magazine > 2008 > 46 > 4 > 144 - 151
IEEE Communications Magazine > 2008 > 46 > 8 > 68 - 74