Sappa, G., Ferranti, F. and De Filippi, F.M. 2016. A proposal of conceptual model for Pertuso Spring discharge evaluation in the Upper Valley of Aniene River. Acque Sotterranee - Italian Journal of Groundwater. 5, 3 (Oct. 2016). DOI:https://doi.org/10.7343/as-2016-224.