R. Casa, M. Rossi, G. Sappa, A. Trotta (2008) - Assessing Crop Water Demand by Remote Sensing and GIS for the Pontina Plain, Central Italy – Water Resources Management – 09/2008
G. Sappa, M. Rossi (2010) - Numerical model implementation to estimate the artesianism drawdown in the North-western Sahara aquifer system. Italian Journal of Engineering Geology and Environment Volume 01-2010.
S. Tersigni, G. Sappa, M.T. Coviello, S. Ramberti (2010) - Considerazioni sullo stato dell’approvvigionamento idropotabile nel territorio italiano - EngHydroEnv Geology 2010, 15, pp. 5-15,
G. Sappa, S. Vitale (2012) - First results on the geochemical characterization of some arsenic contaminated groundwater to better address their exploitation for civil use. 2012. 39th IAH Congress, Niagara Falls (Canada), September 16-21, 2012
G. Sappa, F. Ferranti, S. Ergul, G. Ioanni (2013) - Evaluation of the groundwater active recharge trend in the coastal plain of Dar es Salaam (Tanzania). Journal of Chemical and Pharmaceutical Research, Volume 5, Issue 12, pp 548-552,