Brunelli, Massimo, Ferdinando Corbi, Stefano Sarrocco, and Alberto Sorace. “Trends of Some Wintering Waterbirds in Lazio (1993-2006)”. Rivista Italiana di Ornitologia 82, no. 1-2 (September 30, 2012). Accessed April 23, 2024. https://sisn.pagepress.org/rio/article/view/120.