1. Agency for toxic substances and disease registry;ATSDR,1999
2. Determination of main and trace elements in European bottled mineral water – analytic methods;Birke;Journal of Geochemical Exploration,2010
3. Environmental geochemical maps of Italy from the FOREGS database;De Vivo,2008
4. Environmental Geochemical Atlas of Italy;De Vivo,2009
5. De Vos, W., Tarvainen, T., et al., 2006. Geochemical Atlas of Europe. Part 2 Interpretation of Geochemical Maps, Additional Tables, Figures, Maps, and Related Publications. 692 pages, 56 figures, 77 tables, 15 maps, 6 annexes. Geological Survey of Finland, Espoo.