Frías, M., E. Sabador, S. Ferreiro, M. I. Sánchez de Rojas, R. García, and R. Vigil. 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.