A. L. Kabir, S. S. Chowdhury, Z. Rahim, M. Z. Sarker, and M. R. Chakraborty, “Degree and Pattern of Hearing impairment among patients attending in Audiology department of a tertiary level Hospital in Bangladesh”, Bangladesh J of Otorhinolaryngology, vol. 23, no. 2, pp. 115–121, Jan. 2020.