G. Angeletti, E. Bresca, C. Cavalieri, P. Gambelli, P. Politi, and C. Sebastianelli, “Wintering passerines in the Oasi Stagni Urbani Fano (Province of Pesaro and Urbino, Italy)”, Riv Ital Ornitol, vol. 82, no. 1-2, Sep. 2012.