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).