Grigoriy E. Gurvits (2022) “Black Esophagus: Diagnostic Associations and Management Strategies”, Turkish Journal of Gastroenterology, 33(5), pp. 451–452. Available at: https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/4234 (Accessed: 9 July 2025).