Bauer, Hans-Günther Vogelwarte Radolfzell, Radolfzell, Max Planck Institut für Ornithologie, Max Planck Society;
Gibbons, D. W., Donald, P. F., Bauer, H.-G., Fornasari, L., & Dawson, I. K. (2007). Mapping avian distributions: The evolution of bird atlases. Bird Study, 54(3), 324-334. doi:10.1080/00063650709461492.