1. T. Bartholin (1954 ): Historiarum anatomicarum rariorum centuria. II. Historia XI. Hafniae, Copenhagen. (Kampmeier quotes a later publication but apparently refers to the same case report.).
2. A. Forster, and Kampmeier(1865 ): Die Missbildungen des Menschen, nebst Atlas. 2nd ed. Jena. (.
3. A CASE OF SYMPODIA