@article{ferreira2011birdvis,
	author={Ferreira, N. and Lins, L. and Fink, D. and Kelling, S. and Wood, C. and Freire, J. and Silva, C.},
	journal={IEEE Transactions on Visualization and Computer Graphics},
	number=12,
	pages={2374--2383},
	title={BirdVis: Visualizing and Understanding Bird Populations},
	volume=17,
	year=2011,
}