Schoemaker, Maarten, Bart Mous, Flemming Schlutter, and Gert Jan Akkerman. 2020. “CIRCULAR SHAPED ROUGHNESS ELEMENTS TO MITIGATE OVERTOPPING OF COASTAL REVETMENTS”. Coastal Engineering Proceedings, no. 36v (December):papers.38. https://doi.org/10.9753/icce.v36v.papers.38.