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Dennis EG, Jeffery DW, Johnston MR, Perkins MV, Smith PA (2012). "Procyanidin oligomers. A new method for 4→8 interflavan bond formation using C8-boronic acids and iterative oligomer synthesis through a boron-protection strategy". Tetrahedron. 68: 340–348. doi:10.1016/j.tet.2011.10.039. hdl:2440/76362. INIST25254810.
Brandon MJ, Foo LY, Porter LJ, Meredith P (1980). "Proanthocyanidins of barley and sorghum; composition as a function of maturity of barley ears". Phytochemistry. 21 (12): 2953–2957. Bibcode:1980PChem..21.2953B. doi:10.1016/0031-9422(80)85076-X.
Dennis EG, Jeffery DW, Johnston MR, Perkins MV, Smith PA (2012). "Procyanidin oligomers. A new method for 4→8 interflavan bond formation using C8-boronic acids and iterative oligomer synthesis through a boron-protection strategy". Tetrahedron. 68: 340–348. doi:10.1016/j.tet.2011.10.039. hdl:2440/76362. INIST25254810.
Quinde-Axtell Z, Baik BK (December 2006). "Phenolic compounds of barley grain and their implication in food product discoloration". Journal of Agricultural and Food Chemistry. 54 (26): 9978–84. doi:10.1021/jf060974w. PMID17177530.
Malien-Aubert C, Dangles O, Amiot MJ (May 2002). "Influence of procyanidins on the color stability of oenin solutions". Journal of Agricultural and Food Chemistry. 50 (11): 3299–305. doi:10.1021/jf011392b. PMID12010001.
Identification of the condensed tannins content in grape and Bordeaux wine by means of standards of synthesis. S. Fabre, E. Fouquet, I. Pianet and P-L. Teissedre (articleArchived 2016-03-04 at the Wayback Machine)
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Identification of the condensed tannins content in grape and Bordeaux wine by means of standards of synthesis. S. Fabre, E. Fouquet, I. Pianet and P-L. Teissedre (articleArchived 2016-03-04 at the Wayback Machine)