Frías, M., Sabador, E., Ferreiro, S., Sánchez de Rojas, M. I., García, R., & Vigil, R. (2008). Effect of the activation of a clay-base paper industry by-product on cement matrix behaviour. Materiales De Construcción, 58(292), 67–79. https://doi.org/10.3989/mc.2008.40607