1. Briefe von Theodor Billroth;Fischer,1895
2. Zuricher Spitalgeschite Zurich 1951 Buchdruckerei. Berichthaus, Zurich, pp 259–280.
3. Theodor Billroth in Zurich 1860–1967;Huber,1924
4. Everyday life in a European hospital in the 1830's and 1840's;Walser;J Hist Med,1970
5. Billroth advises Mikulicz;Schein;Surgery,1978