@article{10923, author = {Y. Zhou and J. He and K. Chen and A. Liang and Yan Zhang}, title = {Service Differentiation in OFDM-Based IEEE 802.16 Networks}, year = {2009}, journal = {EURASIP Journal on Wireless Communications and Networking}, volume = {vol. 2009}, number = {Article ID 635304, doi:10.1155/2009/635304.}, publisher = {Springer}, }