1. P. J. Garratt , Aromaticity, McGraw-Hill Book Company, London, 1971
2. V. I. Minkin , M. N.Glukhovtsev and B. Y.Simkin, Aromaticity and Antiaromaticity. Electronic and Structural Aspects, John Wiley & Sons, New York, 1994
3. For recent reviews on many aspects,
4. Aromaticity: a Theoretical Concept of Immense Practical Importance