Y. Neupane, B. Kharel, K. Dongol, R. B. Pradhananga, P. Rayamajhi, and H. Dutta, “Retrospective analysis of difficulties during mastoid surgeries in tertiary referral center in Nepal”, Int J Otorhinolaryngol Head Neck Surg, vol. 7, no. 3, pp. 420–425, Feb. 2021.