R. Di Pietro, “Observations on the beech woodlands of the Apennines (peninsular Italy): an intricate biogeographical and syntaxonomical issue”, Lazaroa, vol. 30, pp. 89–97, Feb. 2010, Accessed: Feb. 04, 2026. Available: https://revistas.ucm.es/index.php/LAZA/article/view/LAZA0909110089A