1. Beales, P.H.: Cerebral Abscess After Obliterative Mastoid Operation; Arch, Otolaryng., 76, 123–125, 1962.
2. Benjamin, B. and Ellis, F.: Mastoid Obliteration; J. Otolaryng., Soc. Aust., 2/2 (36–41), 1967.
3. Elbrand, O : Dansk-Oto-Lar. Selskabs Forh, 17, 1962–63.
4. Frenckner, E: Tympanoplasty Surgical Aspects and experiences Acta Otolaryng, 48, 277, 1957.
5. Frerichs, D.W. and Williams, G.V.: One Stage Endaural Musculotympanoplasty ; Arch. Otolaryng., 76, 23–31, 1962.