Zeitschriftenartikel
Lammertink, M.; Kopuchian, C.; Brandl, H. B.; Tubaro, P. L.; Winkler, H.: A striking case of deceptive woodpecker colouration: the threatened Helmeted Woodpecker Dryocopus galeatus belongs in the genus Celeus. Journal of Ornithology; Springer, Berlin, Heidelberg
157 (1), S. 109 - 116 (2016)