1. Beobachtungen an einem Zweiten erwachsenen Orang-Utang und einem Schimpansen;Fick;Archiv. fur Anat. u. Physiol.,1895
2. 100 Chauveau A. (Paris), “Comparative Anatomy of the Domestic Animals,” translated by G. Fleming, 1873.
3. Postscript to demonstration by Prof. S. G. Shattock;Howarth;Proc. Roy. Soc. Med.,1922
4. Discussion on Demonstration by Irwin Moore of two authenticated cases of Eversion of the Sacculus Laryngis;Faulder;Proc. Rojt. Soc. Med.,1921
5. cited by Beausoleil in 1892;Zawerthal;Rev. de Laryngol., d' Otol., et de Rhinol.,1892