Reference
- Ojala K. Late results of obliteration operation in chronic otitis media. Acta Univ Oul 1979; D47
- Palva T., Palva A., Kärjä J. The chronic ear: Operative methods and results. Acta Otolaryngol (Stockh) 1967; 224: 347, Suppl
- Tos M. Late results in tympanoplasty. Arch Otolaryngol 1974; 100: 302