Franco, L., Y. Pepi, S. de Finis, V. Iorio, G. Bellotti, and C. Cecioni. “ROUGHNESS FACTOR FOR MULTI-LAYER ARMOUR AS OVERTOPPING ESTIMATOR”. Coastal Engineering Proceedings, no. 36v, Dec. 2020, p. structures.25, doi:10.9753/icce.v36v.structures.25.