Casali, Sandro, and Andrea Suzzi Valli. “Distribution and Density of Diurnal and Nocturnal Birds of Prey Nesting in the Protected Naturalistic Area of Monte Titano (Republic of San Marino)”. Rivista Italiana di Ornitologia 82, no. 1-2 (September 30, 2012). Accessed April 20, 2024. https://sisn.pagepress.org/rio/article/view/150.