Rodríguez Rey, Ángel, Montoto, M., Calleja, L. and Ruiz de Argandoña, V.G. 1988. Proposed textural indexes to quantify the distribution of the portland cement clinker phases. Materiales de Construcción. 38, 211 (Sep. 1988), 19–23. DOI:https://doi.org/10.3989/mc.1988.v38.i211.828.