1. USDA, ARS, National Genetic Resources Program, Germplasm Resources Information Network—(GRIN),2003
2. King's American Dispensatiry: Glechoma;Felter,2003
3. Dr Duke's Phytochemical and Ethnobotanical Database;Duke,2003
4. Herbal Medicines;Barnes,2002
5. Biological activity of Glechoma hederacea