1. Fundamentals of Applied Probability Theory, (McGraw-Hill, New York, 1967), Chapter 2.
2. and Dynamical Theory of Crystal Lattices, Appendices VII and VIII (Oxford University Press, London, 1954).
3. and The Mathematics of Physics and Chemistry, 2nd ed., Section 11.31 (D. van Nostrand, Princeton, New Jersey, 1956).
4. and The Theory of Atomic Collisions, (Clarendon Press, Oxford, 1965).
5. Zur Quantentheorie der Molekeln