Dr. A H M Delwar, et al. “Latrogenic and Idiopathic Vocal Cord Paralysis: A Real Obligation of Endoscopic Appraisal”. Global Journal of Medical Research, vol. 20, no. J2, Jan. 2020, pp. 35-41, https://medicalresearchjournal.org/index.php/GJMR/article/view/2036.