@article{johnson_madsen_zimmer_aguilar de soto_tyack_2004, title={Beaked whales echolocate on prey}, volume={271}, ISSN={1471-2970}, DOI={10.1098/RSBL.2004.0208}, number={SUPPL. 6}, journal={Proceedings of the Royal Society B: Biological Sciences}, publisher={Royal Society}, author={Johnson, Mark and Madsen, Peter T. and Zimmer, Walter M. X. and Aguilar De Soto, Natacha and Tyack, Peter L.}, year={2004} }