Thorup, K., Bisson, I., Bowlin, M. S., Holland, R. A., Wingfield, J. C., Ramenofsky, M., & Wikelski, M. (2007). Evidence for a navigational map stretching across the continental U.S. in a migratory songbird. National Academy of Sciences.

Thorup, Kasper, Isabelle-A Bisson, Melissa S. Bowlin, Richard A. Holland, John C. Wingfield, Marilyn Ramenofsky, and Martin Wikelski. Evidence for a Navigational Map Stretching Across the Continental U.S. in a Migratory Songbird. National Academy of Sciences, 2007.

Thorup, Kasper, et al. Evidence for a Navigational Map Stretching Across the Continental U.S. in a Migratory Songbird. National Academy of Sciences, 2007.