Tolong jelaskan mengenai Nota kaki dari Piciformes dalam bahasa melayu

(1969): Les Oiseaux miocènes de la Grive-Saint-Alban (Isère) [The Miocene birds of Grive-Saint-Alban (Isère)]. Geobios 2: 157-204. [French with English abstract]  (HTML abstract)

(1969): A new Pliocene woodpecker, with comments on the fossil Picidae. American Museum Novitates 2400: 1-8. PDF fulltext

Gorman, Gerard (2004): Woodpeckers of Europe: A Study of the European Picidae. Bruce Coleman, UK. ISBN 1 872842 05 4.

(2003): Molecular support for a sister group relationship between Pici and Galbulae (Piciformes sensu Wetmore 1960). J. Avian Biol. 34(2): 185–197.  PDF fulltext