1. (a) Natural Products Chemistry, Vol. 2, Chapt. 9. Academic Press, New York (1975)
2. (b) Naturally Occurring Oxygen Ring Compounds, Butterworths, London (1963)
3. (c) The Chemistry of Flavonoids Compounds, Pergamon Press, London (1962).
4. (a) Heterocyclic Compounds, ed. by Vols. 2 and 5. Wiley, London (1951 and 1957)
5. (b) Arnold Weissberger's Chemistry of Heterocyclic Compounds, ed. by Vols. 20 and 22, Interscience Publishers, London S(1964 and 1967)