Lauretti, S., V. Cardaci, F. Barrese, and L. Calzetta. “Chronic Obstructive Pulmonary Disease (COPD) and Erectile Dysfunction (ED): Results of the BRED Observational Study”. Archivio Italiano Di Urologia E Andrologia, vol. 88, no. 3, Oct. 2016, pp. 165-70, doi:10.4081/aiua.2016.3.165.