Díaz, C., Caballol, D., Díaz, A. and Rodríguez, A. 2013. Dry sand as a specialized layer to improve the acoustic insulation between rooms one above another. Materiales de Construcción. 63, 311 (Sep. 2013), 423–432. DOI:https://doi.org/10.3989/mc.2012.03212.