1. R.D. Present Kinetic Theory of Gases (McGraw Hill, 1958)
2. Moore J.W., Pearson R.G.: Kinetics and Mechanism, 3rd edn. Wiley, New York (1989)
3. Smith I.W.M.: J. Chem. Ed. 59, 9 (1982)
4. A. Gupta, Groundwork of Mathematical Probability and Statistics. (5th edn. revised; Academic Publishers, Kolkata 2004), pp. 123–124
5. A. Szabo, N.S. Ostlund, Modern Quantum Chemistry. (1st edn. revised; McGraw Hill: New York, 1989)