S. E. Stangerup, M. Klokker, S. Vesterhauge, P. Rea, & J. Harcourt. (2022). Auto-inflation Methods and a Proposed Classification of the Eustachian Tube Patency. Current Practice in Medical Science Vol. 4, 176–182. https://doi.org/10.9734/bpi/cpms/v4/3420E