Transrectal ultrasound versus cystography in the evaluation of anatomical stress urinary incontinence Bergman, A.; Mckenzie, C.J.; Richmond, J.; Ballard, C.A.; Platt, L.D. British Journal of Urology 62(3): 228-234 1988 0007-1331 10.1111/j.1464-410x.1988.tb04324.x https://eurekamag.com/research/007/964/007964603.php