IEEE Communications Surveys & Tutorials
IEEE Communications Surveys & Tutorials > 2013 > 15 > 2 > 787 - 802
IEEE Communications Surveys & Tutorials > 2013 > 15 > 2 > 654 - 677
IEEE Communications Surveys & Tutorials > 2013 > 15 > 2 > 787 - 802
IEEE Communications Surveys & Tutorials > 2013 > 15 > 2 > 654 - 677