Castellote, M., M. C. Alonso, and C. Andrade. 2002. “Determination of the OH- Content in the Aqueous Phase of Hardened Cementitious Materials by an Empirical Leaching Method”. Materiales De Construcción 52 (265):39-56. https://doi.org/10.3989/mc.2002.v52.i265.343.