P. K. Saidha, S. Kapoor, A. Suri, A. Gupta, and V. Kakkar, “Evaluation of the role of middle ear risk index as a prognostic tool in cases of tympanoplasty in chronic suppurative otitis media”, Int J Otorhinolaryngol Head Neck Surg, vol. 7, no. 4, pp. 622–626, Mar. 2021.