W. Lehr, and J. Crowcroft. New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005.
2005 First IEEE International Symposium on, page 420-444. (2005)
E. Erikson, and P. Bearman. ISERP Working Paper, 04-07. Institute for Social and Economic Research and Policy (ISERP), Columbia University, New York, (December 2004)