Cassano, Filippo, et al. “The Role of Information and Training for Workers on the Correct Use of Earplugs in Assessing Real Noise Attenuation With E-A-RfitTM System”. La Medicina Del Lavoro, vol. 106, no. 4, July 2015, pp. 284-93, https://doi.org/10.23749/mdl.v106i4.4250.