FIRST SUCCESSFUL EXPERIENCE OF ORGAN-PRESERVING ENDOSCOPIC SURGICAL TREATMENT FOR UPPER URINARY TRACT UROTHELIAL CARCINOMA ArticleKaprin A.D., Merinov D.S., Roshchin D.A., Kachmazov A.A., Serebrianyi S.A., Perepechin D.V., Gurbanov Sh.Sh., Blinov D.S., Pilchuk P.S., Blinova E.V.Clinics in Oncology. Том 5. 2020. 1680 с.