Sumon, M. M. A. K., A. H. M. H. Rahman, S. D. Afsana, and M. B. Hossain. “Causes of Hoarseness of Voice Based on Fiber Optic Laryngoscopy (FOL): Our Experiences in ENT OPD of a Peripheral Military Hospital”. Medicine Today, vol. 33, no. 1, Feb. 2021, pp. 34-37, doi:10.3329/medtoday.v33i01.52156.