Das, Sawmik, Lopa mudra Kakoti, Shiraj Ahmed, Anupam Sarma, and Amal ch kataki. “Study of Serum CEA and Ca 19.9 in Esophageal Squamous Carcinoma and ROC Curve Analysis”. Asian Pacific Journal of Cancer Biology 5, no. 4 (December 7, 2020): 141-145. Accessed April 19, 2024. http://waocp.com/journal/index.php/apjcb/article/view/556.