1. Localized States for Elementary Systems
2. Introduction to Relativistic Quantum Field Theory, New York 1961, ch. 3.
3. The principles of Quantum Mechanics, 4th ed. ch. 3. Oxford, Clarendon 1958.
4. Tabellen zur Fourier Transformation. Berlin 1957, p. 117.
5. and , Introduction to the Theory of Quantized Fields 1957,