Kaffenberger SD, Keegan KA, Bansal NK, Morgan TM, Tang DH, Barocas DA, Penson DF, Davis R, Clark PE, Chang SS, Cookson MS, Herrell SD, Smith JA. Salvage robotic assisted laparoscopic radical prostatectomy: a single institution, 5-year experience. J Urol. 2013 Feb; 189(2):507-13.