De Nunzio, C., Franco, A., Simone, G., Tuderti, G., Anceschi, U., Brassetti, A., Daneshmand, S., Miranda, G., Desai, M. M., Gill, I., Abol-Enein, H., Molinaro, E., Nacchia, A., Lombardo, R., Leonardo, C., & Tubaro, A. (2021). validation of the COBRA nomogram for the prediction of cancer specific survival in patients treated with radical cystectomy for bladder cancer: An international wide cohort study. European journal of surgical oncology, 47(10), 2646–2650. http://access.bl.uk/ark:/81055/vdc_100142216142.0x000042