Paul, G., F. Echterdiek, W. Bohle, and W. Zoller. “Vocal Fold Paralysis Is a Common Complication in Esophageal Cancer Patients With Esophagorespiratory Fistula”. Journal of Gastrointestinal and Liver Diseases, Vol. 29, no. 1, Mar. 2020, pp. 11-17, doi:10.15403/jgld-580.