1. A. Vogel, Ann. Phys., 64, 161–166 (1820).
2. F. M. Dean, Fortschr. Chem. Org. Naturst., 9, 225–291 (1952).
3. R. D. H. Murray, J. Mendez, and S. A. Brown, The Natural Coumarins: Occurrence, Chemistry and Biochemistry, Wiley, Chichester; New York (1982).
4. R. D. H. Murray, Chem. Org. Naturst., 58, 1–81 (1991).
5. R. O’Kennedy, R. D. Thornes, et al., Coumarins: Biology, Applications, and Mode of Action., John Wiley & Sons, New York (1997).