1. References;Handbook of Heterocyclic Chemistry;2010
2. References;Chemistry of Heterocyclic Compounds: A Series Of Monographs;2008-01-02
3. References;Chemistry of Heterocyclic Compounds: A Series Of Monographs;2008-01-02
4. References;Chemistry of Heterocyclic Compounds: A Series Of Monographs;2008-01-02
5. Volume 6 References;Comprehensive Heterocyclic Chemistry II;1996