1. Statistical investigation of the groundwater system in Darb El-Arbaein, Southwestern desert, Egypt;Abdel-Lattif;Earth Sci. Res. J.,2009
2. Addinsoft, 2009. XLSTAT 2009 version 14.0.0.162. Multivariate Statistical Analysis. .
3. Organic Geochemistry Atlas of Colombia;ANH;Earth Sci. Res. J.,2010
4. Antek S.A., 2009. ISO 17025 quality assurance manual for environmental and geochemical analysis, Bogotá, Colombia.
5. Antek S.A., 2008. Hydrogeochemistry Study of Formation waters from San Francisco & Balcon Fields. Internal Report No 0987, 2008 Hocol S.A., Bogotá, Colombia.