Ballelli, S., Tardella, F. M., Pennesi, R., Panichella, T., Bricca, A., Vitanzi, A. in Catorci , A. (2021) „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, 21(1), str. 41–72. doi: 10.2478/hacq-2021-0023 .