Arnaiz-Villena, A. et al. 2001. Phylogeography of crossbills, bullfinches, grosbeaks, and rosefinches. Cellular and Molecular Life Sciences58 (8): 1159–1166. Archived 2011-07-21 at the Wayback Machine
Arnaiz-Villena, A. et al. 2001. Phylogeography of crossbills, bullfinches, grosbeaks, and rosefinches. Cellular and Molecular Life Sciences58 (8): 1159–1166. Archived 2011-07-21 at the Wayback Machine