Gigante, Daniela, and Roberto Venanzoni. 2007. “Some Remarks about the Annual Sub-Nitrophilous Vegetation of Thero-Brometalia in Umbria (central Italy)”. Lazaroa 28 (January): 15-34. https://revistas.ucm.es/index.php/LAZA/article/view/LAZA0707110015A.