@article {Simula.ND.249,
	title = {Service Differentiation in OFDM-Based IEEE 802.16 Networks},
	journal = {EURASIP Journal on Wireless Communications and Networking},
	volume = {vol. 2009},
	number = {Article ID 635304, doi:10.1155/2009/635304.},
	year = {2009},
	publisher = {Springer},
	author = {Zhou, Y. and He, J. and Chen, K. and Liang, A. and Zhang, Yan}
}
