Fuchs, J.; Pons, J.-M.; Ericson, P.G.P.; Bonillo, C.; Couloux, A.; Pasquet, E. (2008). "Molecular support for a rapid cladogenesis of the woodpecker clade Malarpicini, with further insights into the genus Picus (Piciformes: Picinae)". Molecular Phylogenetics and Evolution. 48 (1): 34–46. doi:10.1016/j.ympev.2008.03.036. PMID18487062.
Zhou, C.; Hao, Y.; Ma, J.; Zhang, W.; Chen, Y.; Chen, B.; Zhang, X.; Yue, B. (2017). "The first complete mitogenome of Picumnus innominatus (Aves, Piciformes, Picidae) and phylogenetic inference within the Picidae". Biochemical Systematics and Ecology. 70: 274–282. doi:10.1016/j.bse.2016.12.003.
Koelz, W (1950). "New subspecies of birds from southwestern Asia". Am. Mus. Novit. 1452: 1–10. hdl:2246/4237.
Short, L.L. (1973). "Habits of some Asian woodpeckers (Aves, Picidae)". Bulletin of the American Museum of Natural History. 152 (5): 281–283. hdl:2246/603.
Buren, William F. (1958). "A Review of the Species of Crematogaster, Sensu Stricto, in North America (Hymenoptera: Formicidae) Part I". Journal of the New York Entomological Society. 66 (3/4): 119–134. JSTOR25005661.
Dalgleish, R.C. (1972). "The Penenirmus (Mallophaga: Ischnocera) of the Picidae (Aves: Piciformes)". Journal of the New York Entomological Society. 80 (2): 83–104. JSTOR25008805.
Fuchs, J.; Pons, J.-M.; Ericson, P.G.P.; Bonillo, C.; Couloux, A.; Pasquet, E. (2008). "Molecular support for a rapid cladogenesis of the woodpecker clade Malarpicini, with further insights into the genus Picus (Piciformes: Picinae)". Molecular Phylogenetics and Evolution. 48 (1): 34–46. doi:10.1016/j.ympev.2008.03.036. PMID18487062.