ŁUKASZEWSKA, Ewa, JASIUK, Ilona and CHROŚCIŃSKI, Kamil. Transrectal ultrasound (TRUS) as a diagnostic tool for abscesses and fistulas of the anus. Anatomy and methodology of the TRUS examination. Journal of Education, Health and Sport. Online. 24 September 2024. Vol. 68, p. 55216. [Accessed 26 December 2025]. DOI 10.12775/JEHS.2024.68.55216.