1. Chromenes, chromanones, and chromones;Ellis,1977
2. Synthesis and reactions of halogen-containing chromones;Ya Sosnovskikh;Russ. Chem. Rev.,2003
3. Flavonoids in the Living Systems: Advances in Experimental Medicine and Biology, vol. 439,1998
4. Comprehensive Medicinal Chemistry, vol. 6,1990
5. The Chemistry of Heterocyclic Compounds, Chromenes, Chromanones and Chromones, vol. 31,2007