An unusual case of malignant esophago-pulmonary fistula secondary to esophageal carcinoma (M. P. Noorullah, H. Backer P, K. N. Mohan Rao, & A. K. Shukla, Trans.). (2018). Indian Journal of Case Reports, 4(3), 221-223. https://mansapublishers.com/ijcr/article/view/981