Z. I. Mishura, R. K. Paliyenko, and N. R. Kerbazh, “The level of matrix metalloproteinase-9 in the serum as a prognostic sign in extrasphincteric fistulas of the rectum”, IJM, vol. 9, no. 2, pp. 60–62, Jul. 2021, doi: 10.14419/ijm.v9i2.31595.