@article {Simula.simula.950,
	title = {Cognitive Radio Based Hierarchical Communications Infrastructure for Smart Grid},
	journal = {IEEE Network Magazine},
	volume = {25},
	number = {5},
	year = {2011},
	month = {Sept/Oct.},
	author = {Yu, Rong and Zhang, Yan and Gjessing, Stein and Chau, Y. and Xie, Shengli and Guizani, M.}
}
