Tufano, A., Frisenda, M., Rossi, A., Viscuso, P., Mantica, G., Bove, P., Leonardi, R. and Calarco, A. (2022) “External validation of Resorlu-Unsal stone score in predicting outcomes after retrograde intrarenal surgery. Experience from a single institution”, Archivio Italiano di Urologia e Andrologia, 94(3), pp. 311–314. doi: 10.4081/aiua.2022.3.311.