A COMPARISON AMONG PCNL, MINIPERC AND ULTRAMINIPERC FOR LOWER CALYCEAL STONES BETWEEN 1 AND 2 CM: A PROSPECTIVE, COMPARATIVE, MULTICENTER AND RANDOMISED STUDY Article Bozzini G., Besana U., Calori A., Lorenzo B., Buizza C., Aydogan T.B., Müller A., Sighinolfi M.C., Rocco B., Govorov A., Pushkar D.Y., Pini G., Pastore A.L., Romero-Otero J. BMC Urology. BioMed Central. Vol. 20. 2020. 67 p.