Metal ion removal from water by sorption on paper mill sludge, Calace, N., Nardi Elisa, Petronio B.M., Pietroletti M., and Tosti G. , Chemosphere, Volume 51, Number 8, p.797-803, (2003)

Adsorption isotherms for describing heavy-metal retention in paper mill sludges, Calace, N., Di Muro A., Nardi Elisa, Petronio B.M., and Pietroletti M. , Industrial and Engineering Chemistry Research, Volume 41, Number 22, p.5491-5497, (2002)