Kosinski, Z., ja A. Winiecki. ”Nest-Site Selection and Niche Partitioning Among the Great Spotted Woodpecker Dendrocopos Major and Middle Spotted Woodpecker Dendrocopos Medius in Riverine Forest of Central Europe”. Ornis Fennica, vsk. 81, nro 4, joulukuuta 2004, ss. 145–156, https://ornisfennica.journal.fi/article/view/133622.