1. M.A. Amerine, and C.S. Ough ) 1980 . Methods for Analysis of Musts and Wines , p.341 . John Wiley and Sons, New York.
2. M.A. Amerine, R.E. Kunkee, C.S. Ough, V.L. Singleton, and A.D. Webb ) 1980 . The Technology of Wine Making , 4th ed. , p.794 . AVI Publishing Co., Westport, CT.
3. Haemanalysis of tannins: The concept of relative astringency
4. M.J. Coign, 1988 . Personal communication. Dept. of Biochemistry and Molecular Biology, Mississippi State Univ.