1. Anzalone B (1961) Osservazioni fitosociologiche su alcune faggete depresse del Lazio. Ann Bot 27:120–134
2. Battisti C, Guidi A (2010) Comparing spatial rarity between long distance migrant and sedentary bird species using atlas data and diversity/dominance diagrams. Vie Milieu 60:321–326
3. Battisti C, Vignoli L, Bologna MA (2010) Breeding birds in an Appennine Massif (Majella, central Italy): do “common species” could act as surrogate for characterize species richness and composition of the communities? Ekologia (Bratislava) 29:207–218
4. Bibby CJ, Burgess ND, Hill DA, Mustoe SH (2000) Bird census techniques, vol 2. Academic Press, London
5. Blasi C (1994) Fitoclimatologia del Lazio. Fitosociologia 27:151–175