1. R. Robinson, Outline of an Electrochemical Theory of the Course of Organic Reactions, Inst. Chem. Great Britain and Ireland, London, 1932.
2. Principles of an Electronic Theory of Organic Reactions.
3. C.K. Ingold, Structure and Mechanism in Organic Chemistry, Cornell Univ. Press, Ithaca, 1953.
4. THE ATOM AND THE MOLECULE.