Gupta, A., and P. S. Jamwal. “Clinical Study of 100 Cases of Hoarseness of Voice: A Hospital Based Study”. International Journal of Otorhinolaryngology and Head and Neck Surgery, vol. 4, no. 6, Oct. 2018, pp. 1355-8, doi:10.18203/issn.2454-5929.ijohns20184179.