IEEE Communications Surveys & Tutorials
IEEE Communications Surveys & Tutorials > 2012 > 14 > 2 > 279 - 298
IEEE Communications Surveys & Tutorials > 2012 > 14 > 2 > 443 - 463
IEEE Communications Surveys & Tutorials > 2012 > 14 > 2 > 279 - 298
IEEE Communications Surveys & Tutorials > 2012 > 14 > 2 > 443 - 463