Menéndez, I., F. Triviño, and F. Hernández. “Correlations Among Plasticity, Mechanical Strength, water/Cement Ratios and Limestone Filler Content in Cement Mortars”. Materiales De Construcción, vol. 43, no. 232, Dec. 1993, pp. 39-51, doi:10.3989/mc.1993.v43.i232.666.