Thanks to István Béres and Márton Horváth we are presenting here M. Sc. Thesis on the Short-toed Eagle population in the Zemplén Mountains /map/. This is results of 25 years’ monitoring work:
• István BÉRES, 2007 – A Kígyászölyv (Circaetus gallicus) viselkedési és fészkelési szokásai a Zempléni-hegységben [Behaviour and breeding habits of the Short-toed Eagle in the Zemplén-mountains] – M.Sc.Thesis – Debrecen: 56 p. – 
(Hu) {rough translation}.