Ballelli, S.; Tardella, F. M.; Pennesi, R.; Panichella, T.; Bricca, A.; Vitanzi, A.; Catorci , A. Contribution to the Knowledge of the Non-Calcareous Grasslands of the Monti Sibillini National Park (central Italy): Coenological Structure, Syntaxonomy, Ecology, and Floristic Aspects. Hacquetia 2021, 21, 41-72.