Cobalt and manganese recovery from spent industrial catalysts by hydrometallurgy, Fontana, Danilo, and Forte Federica , Green Design, Materials and Manufacturing Processes - Proceedings of the 2nd International Conference on Sustainable Intelligent Manufacturing, SIM 2013, Lisbon, p.203-208, (2013)

Separation of middle rare earths by solvent extraction using 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester as an extractant, Fontana, Danilo, and Pietrelli L. , Journal of Rare Earths, Volume 27, Number 5, p.830-833, (2009)

Extraction of titanium (IV) from acidic media by 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester, Fontana, Danilo, Kulkarni P., and Pietrelli L. , Hydrometallurgy, Volume 77, Number 3-4, p.219-225, (2005)