Gupta, M., and G. Datta. “An Innovative Technique to Repair Cervical Oesophageal Perforation Using Oro-Oesophageal Tube and AMBU”. Bengal Journal of Otolaryngology and Head Neck Surgery, vol. 27, no. 2, Aug. 2019, pp. 171-5, doi:10.47210/bjohns.2019.v27i2.247.