Förschler, Marc Immanuel Vogelwarte Radolfzell, Radolfzell, Max Planck Institut für Ornithologie, Max Planck Society;
Förschler, M. I., & Kalko, E. K. V. (2006). Macrogeographic variations in food choice of mainland citril finches Carduelis (citrinella) citrinella versus insular Corsican (citril) finches Carduelis (citrinella) corsicanus. Journal of Ornithology, 147(3), 441-447. doi:10.1007/s10336-005-0032-6.