Ulys, Albertas, et al. “Bilateral Retroperitoneoscopic Ureterocutaneostomy: A New Option in the Treatment of Vesico-Rectal Fistulas”. Lietuvos Chirurgija, vol. 13, no. 4, Feb. 2015, pp. 258-63, https://doi.org/10.15388/LietChirur.2014.5112.