Physicochemical or geochemical

• Daniele, L., (2004), Distribution of arsenic and other minor trace elements in the groundwater of Ischia Island (southern Italy), Environmental Geology, 46, 96-103, 10.1007/s00254-004-1018-z

Physicochemical or geochemical

• Lima, A., Cicchella, D., Di Francia, S., (2003), Natural contribution of harmful elements in thermal groundwaters of Ischia Island (southern Italy), Environmental Geology, 43, 930-940, 10.1007/s00254-002-0715-8