IEEE Communications Letters
IEEE Communications Letters > 2012 > 16 > 5 > 756 - 759
IEEE Communications Letters > 2012 > 16 > 12 > 1952 - 1955
IEEE Communications Letters > 2012 > 16 > 5 > 756 - 759
IEEE Communications Letters > 2012 > 16 > 12 > 1952 - 1955