SAINIO P. Fistula-in-ano in defined populations: Incidence and epidemiological aspects. Ann Chir Gynaecol, 1984, 73 : 219-24.
LUNNIS P. J., ARMSTRONG P., BARKER P. G., et al. Magnetic resonance maying of anal fistulae. Lancet, 1992, 340 : 394-96.
CHOEN S., BURNETT S., BARTRAM C. I., NICHOLLS R. J. Comparison between anal endosonography and digital examination in the evaluation of and fistulae. Br J. Surg, 1991, 78 : 445-447.
KUIJPERS H. C., SCHULPEN T. Fistulography for fistula-in- ano : Is it useful ? Dis Colon Rectum, 1985, 28 : 103-104.
KOELBEL G., SCHMIEDL U., MAJER M. C., et al. Diagnosis of fistulae and sinus tracts in patients with Crohn disease Value of MR imaging. AJR., 1989, 153 : 999-1003.
DE SOUZA N. M., HALL A. S., PUNI R., et al. High resolution magnetic resonance imaging of the anal sphincter using a dedicated endoanal coil. Dis Colon Rectum., 1996, 39 : 926-934.
WEXNER S. D., ROSEN L., ROBERTS P. L., et al. Practice parameters for treatment of fistula-in-ano - Supporting documentation. Dis Colon Rectum., 1996, 39 : 1363-72.
SPENCER J. A., WARD J., BECKINGHAM I. J., et al. Dynamic contrast-enhanced MR imaging of perianal fistulas. AJR. 1996, 167 : 735-741.
THORVINGER B., HORVATH G., SAMUELSSON L. C. T. Demonstration of fistulae in patients with gynecologic neoplasms. Acta Radiol. 1990, 31 : 357-360.
DEEN K. I., WILLIAMS J. G., HUTCHINSON R., et al. Fistulas in ano : endoanal ultrasonographic assessment assists decision making for surgery. Gur, 1994, 35 : 391-394.
LUNNIS P. J., BARKER P. G., SULTAN A. H. et al. Magnetic resonance unaging of fistula-in-ano. Vis Colon Rectum, 1994, 37 : 708-18.
BARKER P. G., LUNNISS P. J., ARMSTRONG P. et al. Magnetic resonance imaging of fistula-in-ano : Technique, Interpretation and Accuracy. Clinical Radiology. 1994, 49 : 7-13.
BECKINGHAM I. J., SPENCER J. A. et al. Prospective evaluation of dynamic contrast enhanced magnetic resonance imaging in the evaluation of fistula-in-ano. BJS, 1996, 83 : 1396-1398.
VAN BEERS B., GRANDIN C., KARTHEUSER A. et al. MRI of complicated anal fistulae; Comparison with digital examination. J. Comput Assist Tomogr. 1994, 18 : 87-90.
HUSSAIN S. M., STOKER J., SCHOUTEN W. R., HOP W. C. J., Lameris J. S. Fistula-in-ano : Endoanal sonography versus endoanal MR Imaging in classification. Radiology. 1996, 200 : 475-481.
STOKER J., HUSSAIN S. M., LAMERIS J. S. Endoanal magnetic resonance imaging versus endosonography. Radiol Med. 1996, 92 : 738-41.
SPENCER J. A., WARD J. and AMBROSE S. Pictorial review : Dynamic contrastenhanced MR Imaging of perianal fistulae. Clinical Radiology. 1998, 53 : 96-104.
HALLIGAN S., BARTRAM C. I. MR Imaging of fistula-in- ano : Are endoanal coils the gold standard ? AJR. 1998, 171 : 407-412.
STOKER J., HUJSSAIN S., VAN KEMPEN D. et al. Endoanal coil in MR Imaging of anal fistulas. AJR. 1996, 166 : 360-362.
MYHR G. E., MYRVOLD H. E., NILSEN G. et al. Perianal fistulas : Use of MR Imaging for diagnosis. Radiology. 1994, 191 : 545-549.
HALLIGAN S., HEALY J. C., BARTRAM C. I. Magnetic resonance imaging of fistula-in-ano : STIR or SPIR ? BJR. 1998, 71 : 111-145.
MERGO P. J., HELMERGER T., CERDA J. J., URRUTIA M., ROS P. R. Rectal Perflubron : New Application in MRI of perirectal fistulae. J. Comput Assist Tomogr, 1997, 21 : 259-264.