This old paper, dedicated to study of Short-toed Eagle diet in the Capanne di Marcarolo Natural Regional Park /map/ at the end of XX century, is available on the Carmagnola Natural History Museum site:
• Massimo CAMPORA, Silvia ALBERTI, 1997 – Osservazioni sulla dieta del biancone (Circaetus gallicus) in un’area dell’Appennino settentrionale [Observations on Short-toed Eagle diet in Northern Appennines (Italy, NW)] // Rivista Piemontese di Storia Naturale, 18: 233-239. – 
(It).