@proceedings {65,
	title = {Characteristics of Underground Channel for Wireless Underground Sensor Networks},
	journal = {Med-Hoc-Net {\textquoteright}07},
	year = {2007},
	month = {Jun. 2007},
	address = {Corfu, Greece},
	author = {L. Li and Mehmet C. Vuran and I. F. Akyildiz}
}
