IEEE Communications Letters
IEEE Communications Letters > 2012 > 16 > 2 > 180 - 182
IEEE Communications Letters > 2012 > 16 > 3 > 400 - 403
IEEE Communications Letters > 2014 > 18 > 5 > 853 - 856
IEEE Communications Letters > 2016 > 20 > 3 > 418 - 421