Two articles have been discovered on the Net:
• D.E. Bakaloudis, C.G. Vlachos, G.J. Holloway, 2000 – Nest features and nest-tree characteristics of Short-toed Eagles (Circaetus gallicus) in the Dadia-Lefkimi-Soufli Forest, Northeastern Greece // Raptor Res. 34(4): 293-298. – 
(En) /map/ (source – www.researchgate.net).
• J. Overpeck, C. Whitlock, B. Huntley, 2003 – Terrestrial biosphere dynamics in the climate system: past and future – (En). Fig. 5.13. Potential distribution of species under climate change scenarios in Europe – // Paleoclimate, Global Change and the Future: 220 pp.