IEEE Communications Surveys & Tutorials
IEEE Communications Surveys & Tutorials > 2004 > 6 > 2 > 2 - 20
IEEE Communications Surveys & Tutorials > 2004 > 6 > 3 > 16 - 33
IEEE Communications Surveys & Tutorials > 2004 > 6 > 2 > 2 - 20
IEEE Communications Surveys & Tutorials > 2004 > 6 > 3 > 16 - 33