A new work of Dimitris E. Bakaloudis and Christos G. Vlachos on feeding of Short-toed Eagle in the Dadia-Lefkimi-Soufli National Park /map/ is published on the Journal of Biological Research website:
• Dimitrios E. Bakaloudis, Christos G. Vlachos, 2011 – Feeding habits and provisioning rate of breeding short-toed eagles Circaetus gallicus in northeastern Greece // Journal of Biological Research-Thessaloniki 16: 166 – 176. – 
(En).
The Wiley InterScience website database allows to find full texts or abstracts of articles dedicated to Short-toed Eagle. Here are two of 12 articles from the actual search results:
• D.E. BAKALOUDIS, C.G. VLACHOS, G.J. HOLLOWAY, 1998 – Habitat use by Short-toed Eagles Circaetus gallicus and their reptilian prey during the breeding season in Dadia Forest (north-eastern Greece) // Journal of Applied Ecology, Vol. 35, No. 6: 821-828. – (En) /map/ – the abstract was mentioned before.
• ANTONIO-ROMÁN MUÑOZ, BERT TOXOPEUS, JAVIER ELORRIAGA, JUAN-MIGUEL GONZALEZ, BEATRIZ YÁÑEZ, 2010 – First record of a communal roost of Short-toed Eagles Circaetus gallicus // Ibis, Vol. 152, No. 1: 173-175. – (En).
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.
You can find an article of Christos G. Vlachos on the University of New Mexico. University Libraries website. The work was dedicated to Short-toed Eagle ecology in North-Eastern Greece /map/:
• CHRISTOS G. VLACHOS and NIKOLAOS K. PAPAGEORGIOU, 1994 – Diet, breeding success, and nest-site selection of the Short-toed Eagle (Circaetus gallicus) in Northeastern Greece // Raptor Res. 28(1): 39-42. – (En).
Let us draw your attention to a work of Dimitris E. Bakaloudis, Christos G. Vlachos and Graham J. Holloway on Short-toed Eagle in northeast Greece /map/:
• D.E. Bakaloudis, C.G. Vlachos, G.J. Holloway, 2005 – Nest spacing and breeding performance in Short-toed Eagle Circaetus gallicus in northeast Greece // British Trust for Ornithology, Bird Study, 52: 330–338. – (En).
This text can be found on the Taylor & Francis Online website.
Here you can acquaint yourself with the work on the wintering of Short-toed Eagle and Booted Eagle in Spain:
• José Enrique Martínes y José Antonio Sánchez-Zapata, 1999 – Invernada de Aguililla Calzada (Hieraaetus pennatus) y Culebrera Europea (Circaetus gallicus) en España [Wintering of Booted Eagles and Short-toed Eagles in Spain] // Ardeola 46 (1): 93-96 – (Es) (source – Ardeola website).
…and with the abstract of an article about Greek Short-toed Eagles:
• D.E. Bakaloudis, C.G. Vlachos, G.J. Holloway, 1998 – Habitat Use by Short-Toed Eagles Circaetus gallicus and Their Reptilian Prey During the Breeding Season in Dadia Forest (North-Eastern Greece) // Journal of Applied Ecology, Vol. 35, No. 6: 821-828 (En) /map/ (source – the JSTOR database).