@article{cdb-cj04,
	author={Z. Chen and A. Delis and H.L. Bertoni},
	title={{Building Footprint Simplification Techniques and
			Their Effects on Radio Propagation Predictions}},
	journal={The Computer Journal}, 
	publisher={Oxford University Press},
	volume={47}, 
	number={1}, 
	pages={1-31}, 
	month={January}, 
	year={2004}
	}