M. Antonellini, P. Mollema, B. Giambastiani, K. Bishop, L. Caruso, A. Minchio, L. Pellegrini, M. Sabia, E. Ulazzi, and G. Gabbianelli, “Salt water intrusion in the coastal aquifer of the southern Po Plain, Italy,” Hydrogeology Journal, Vol. 16, No. 8, December 2008.
 R. M. Powell and R. W. Puls, “Passive sampling of groundwater monitoring wells without purging: Multi-level well chemistry and tracer disappearance,” Journal of Contaminant Hydrology, Vol. 12, No. 1–2, pp. 57–77, 1993.
 E. Shalev, A. Lazar, S. Wollman, S. Kington, Y. Yechieli, and H. Gvirtzman, “Biased monitoring of fresh water-salt water mixing zone in coastal aquifers, Ground Water, Vol. 47, No. 1, pp. 49–56, 2009.
 T. E. Reilly and D. R. LeBlanc, “Experimental evaluation of factors affecting temporal variability of water samples obtained from long-screened wells,” Ground Water, Vol. 36, No. 4, pp. 566–576, 1998.
 B. M. S. Giambastiani, M. Antonellini, G. H. P. Oude Essink, R. J. Stuurman, “Saltwater intrusion in he uncon-fined coastal aquifer of Ravenna (Italy): A numerical model,” Journal of Hydrology, Vol. 340, pp. 91–104, 2007.
 P. Teatini, M. Ferronato, G. Gambolati, and M. Gonella, “Groundwater pumping and land subsidence in the Emilia-Romagna coastland, Italy: Modeling the past oc-currence and the future trend,” Water Resources Research, Vol. 42, 2006.
 M. Bondesan, G. Calderoni, and R. Dal Cin, “Il litorale delle province di Ferrara e di Ravenna (alto Adriatico), evoluzione morfologica e distribuzione dei sedimenti,” Boll Soc Geol, pp. 247–287, 1978.
 A. Amorosi, M. L. Colalongo, G. Pasini, D. Preti, “Sedi- mentary response to Late Quaternary sea-level changes in the Romagna coastal plain (Northern Italy),” Sedimentology, Vol. 46, pp. 99–121. 1999.
 L. Marchesini, A. Amorosi, U. Cibin, A. Zuffa, E. Spadafora, and D. Preti, “Sand composition and sedimentary evolution of a late quaternary depositional sequence, Northwestern Adriatic Coast, Italy,” Journal of Sedimentary Research, Vol. 70, No. 4, pp. 829–838, 2000.
 A. Veggiani, “Le ultime vicende geologiche del Raven-nate,” In: Influenza di insediamenti industriali sul circos- tante ambiente naturale, Studio sulla pineta di S. Vitale di Ravenna. Ed. Compositori, Bologna, pp. 48–58, 1974.
 UNESCO, “Algorithms for computation of fundamental properties of seawater. Unesco technical papers in marine science 44,” Unesco/SCOR/ICES/IAPSO Joint Panel on Oceanographic Tables and Standards and SCOR Working Group 51, 1983.