Dale, James Abteilung Kempenaers, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society;
Tibbetts, E. A., & Dale, J. (2007). Individual recognition: It is good to be different. Trends in Ecology and Evolution, 22(10), 529-537. doi:10.1016/j.tree.2007.09.001.