Madonia, P., Cangemi, M. and Di Trapani, F.P. 2013. The use of non-invasive field techniques in the study of small topographically closed lakes: two case studies in Sicily (Italy). Annals of Geophysics. 56, 1 (May 2013), R0113. DOI:https://doi.org/10.4401/ag-5631.