Maziarz, P.; Prokop, A.; Matusik, J. A Comparative Study on the Removal of Pb(II), Zn(II), Cd(II) and As(V) by Natural, Acid Activated and Calcined Halloysite. geol 2015, 41 (1), 108. https://doi.org/10.7494/geol.2015.41.1.108.