P. Dani, T. Dhanelia, A. Minj, N. Swarnkar, S. Gupta, and B. R. Singh, “Symptom-based clinical and tympanometric assessment of Eustachian tube dysfunction”, Int J Otorhinolaryngol Head Neck Surg, vol. 12, no. 5, pp. 713–718, Aug. 2026.