Gajbhiye, R., B. Tirpude, V. Akulwar, H. Bhanarkar, and A. R. Chavan. “Impacted Foreign Body in Oesophagus Video Assisted Thoracoscopic Surgery Approach”. International Surgery Journal, vol. 6, no. 9, Aug. 2019, pp. 3421-3, doi:10.18203/2349-2902.isj20194092.