Published Leaching of lead from clinoptilolite at acidic conditions by Petrakakis Y., Mylona E., Georgantas D. and Grigoropoulou H.
Published Study of polyacrylic acid adsorption on the interface of hydroxyapatite – electrolyte solutions by Hafez I.T., Paraskeva C.A., Klepetsanis P.G. and Koutsoukos P.G.,