Ruggieri R. (*), Messina Panfalone D. (*), Antonioli F. (**), Rosso A. (°), Sanfilippo R. (°) & Maniscalco R. (°)
(*) Centro Ibleo di Ricerche Speleo-Idrogeologiche, Ragusa, Italy. E-mail: info@cirs- ragusa.org
(**) ENEA, Casaccia, Roma, Italy.
(°) Department of Biological, Geological and Environmental Sciences, Section of Earth Science, University of Catania, Italy.