1. Current state of the problem of aromaticity
2. P. J. Garratt , Aromaticity, McGraw-Hill, London, 1971;
3. P. J. Garratt , Aromaticity, Wiley, New York, 1986.
4. P. J. Garratt , Comprehensive Organic Chemistry, Pergamon Press, Oxford, 1979, vol. 1, p. 215.
5. Structure and reactivity of molybdenum clusters with loose coordination site, Mo3[S4P(OEt)2]4L