Bilal, Bilal A, et al. “EARLY RESULTS OF OESOPHAGECTOMY FOR CARCINOMA OESOPHAGUS IN 1008 CASES”. Journal of Ayub Medical College Abbottabad, vol. 22, no. 4, Dec. 2010, pp. 109-14, https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/2722.