1. Mathematische Grundlagen der Quantenmechanik (Springer, Berlin, 1932), p. 171;
2. transl. by E. T. Beyer, Mathematical foundations of quantum mechanics (Princeton Univ. Press, Princeton, 1955), p. 324.
3. Quantum Theory: Concepts and Methods (Kluwer Academic Publishers, 1995).
4. On the mathematical foundations of theoretical statistics
5. Statistical methods and scientific inference, 2nd edn. (Oliver and Boyd, London, 1959).