Chizh, Nikolay A. “Endoscopic Cryosurgery”. Problems of Cryobiology and Cryomedicine 27, no. 1 (March 25, 2017): 3–18. Accessed May 6, 2024. http://journal.cryo.org.ua/index.php/probl-cryobiol-cryomed/article/view/1274.