Di Pietro, R. (2010): “Observations on the beech woodlands of the Apennines (peninsular Italy): an intricate biogeographical and syntaxonomical issue”, Lazaroa, 30, pp. 89–97. Available at: https://revistas.ucm.es/index.php/LAZA/article/view/LAZA0909110089A (Accessed: 5 December 2025).