Leach WE (1820). „Eleventh Room”. Synopsis of the Contents of the British Museum. 17 (17th изд.). London: British Museum. стр. 68. Although the name of the author is not specified in the document, Leach was the keeper of zoology at the time.
Benz BW, Robbins MB, Peterson AT (август 2006). „Evolutionary history of woodpeckers and allies (Aves: Picidae): placing key taxa on the phylogenetic tree”. Molecular Phylogenetics and Evolution. 40 (2): 389—99. PMID16635580. doi:10.1016/j.ympev.2006.02.021.CS1 одржавање: Формат датума (веза)
Manegold A, Töpfer T (2013). „The systematic position of Hemicircus and the stepwise evolution of adaptations for drilling, tapping and climbing up in true woodpeckers (Picinae, Picidae)”. Journal of Zoological Systematics and Evolutionary Research. 51 (1): 72—82. doi:10.1111/jzs.12000.
Benz BW, Robbins MB, Peterson AT (август 2006). „Evolutionary history of woodpeckers and allies (Aves: Picidae): placing key taxa on the phylogenetic tree”. Molecular Phylogenetics and Evolution. 40 (2): 389—99. PMID16635580. doi:10.1016/j.ympev.2006.02.021.CS1 одржавање: Формат датума (веза)