1. Heterocyclic Mesomeric Betaines and Analogs in Natural Product Chemistry. Betainic Alkaloids and Nucleobases
2. Heterocyclic mesomeric betaines
3. in: The Chemistry of Heterocyclic Compounds, 3-dipolar Cycloaddition Chemistry Toward Heterocycles and Natural Products (Eds.: Wiley, New York, 2002 , p. 681.
4. Meso-ionic heterocycles (1976–1980)
5. in: The Chemistry of Heterocyclic Compounds, 3-dipolar Cycloaddition Chemistry Toward Heterocycles and Natural Products (Eds.: Wiley, New York, 2002 , p. 681.