Fuchs Jerome, Pons Jean-Marc, Liu Liang, Ericson Per G. P., Couloux Arnaud & Pasquet Eric, 2013 — A multi-locus phylogeny suggests an ancient hybridization event between Campephilus and melanerpine woodpeckers (Ayes: Picidae). Molecular Phylogenetics and Evolution vol. 67, n° 3, p. 578-588