MULTI-TRACT PERCUTANEOUS NEPHROLITHOTOMY IN THE MANAGEMENT OF STAGHORN STONES Article Merinov D.S., Artemov A.V., Epishov V.A., Arustamov L.D., Gurbanov S.S., Polikarpova A.M. Urologiia (Moscow, Russia : 1999). 2018. P. 96-101