1. The letter C denotes “charge”.
2. T. D. Lee and C. N. Yang, Physical Review
104, 254 (1956).
3. The CPT-theorem was first clearly recognised by G. Lüders, Det Kongelige Danske Videnskabernes Selskabs, matematisk-fysiske Meddelelser
28, No. 5 (1954). See also Annals of Physics (New York) 2, 1 (1957).
4. Further references: J. Schwinger, Physical Review
82, 914 (1951)
5. W. Pauliin Niels Bohr and the Development of Physics (Pergamon Press, London 1955), p. 30; for non-local theories a condition equivalent to the CPTtheorem, which is satisfied identically for local theories