1. AEG Patent Office: Letter to S&H, 12.1.1943: “Regarding the level of licence costs”;AEG,1943
2. A study by means of the electron microscope of the reaction between tobacco mosaic virus and its antiserum;Anderson;Journal of Biological Chemistry,1941
3. Letter Bader to Scherzer, 12.01.1954: “Request for advice to select between S&H ÜM and the BOSCH-EM”;Bader,1954
4. Letter Bader to Scherzer, 29.01.1954: “Answer to Scherzer's advice of 18.01.1954;Bader,1954
5. Letter Bader to Klingler at S&H, 23.03.1954: “Why the decision pro Bosch?”;Bader,1954