Pietropaolo, A. Bres-Niewada, E. Skolarikos, A. Liatsikos, E. Kallidonis, P. Aboumarzouk, O. Tailly, T. Proietti, S. Traxer, O. Giusti, G. Rukin, N. Özsoy, M. Talso, M. Emre, S.T. Emiliani, E. Atis, G. Somani, B.K., Worldwide survey of flexible ureteroscopy practice: a survey from european association of urology sections of young academic urologists and uro-technology groups, Central European Journal of Urology, (72), 393-397, 2019, Polish Urological Association,