2 literature references for Dendrocopos syriacus (Hemprich & Ehrenberg, 1833):

Author: Gill, Frank, and Minturn Wright
Year: 2006
Title:
Source: Birds of the World: Recommended English Names
Author:
Year: 2005
Title:
Source: website, Zoonomen - Zoological Nomenclature Resource, 2005.12.06