ÖNGEN, Cengiz, Şükrü TANER, M. Kürşat BOZKURT, and Y. Selim İLHAN. 1993. “THE IMPORTANCE OF NASOGASTRIC TUBE IN GASTROINTESTINAL SURGERY”. Turkish Journal of Gastroenterology 4 (2):347-51. https://www.turkjgastroenterol.org/index.php/tjg/article/view/279.