Nathan F. Putmansend, Kenneth J. Lohmann, Emily M. Putman, Thomas P. Quinn, A. Peter Klimley, David L.G. Noakes (2013). Evidence for Geomagnetic Imprinting as a Homing Mechanism in Pacific Salmon. Current Biologyonline preprint. DOI: 10.1016/j.cub.2012.12.041.