1. Zur Kenntniss der Ketene. Diphenylketen
2. (b) Brown, K.Penicillin Man: Alexander Fleming and the Antibiotic Revolution; Sutton: Gloucestershire, UK, 2004.
3. (c) Woodward, R. B.; Johnson, J. R.; Robinson, R. InTheChemistry of Penicillin; Clarke, H. T., Johnson, J. R., Robinson, R., Eds.; Princeton University Press: Princeton, NJ, 1949; Chapter 15, pp 440−454.