6Packer L, Rimbach G, Virgili F. Antioxidant activity and biologic properties of a procyanidin - rich extract from pine ( Pinus maritima) bark, pycnogenol[ J]. Free Radic Biol Med, 1999, 27(5 -6) : 704 - 724.
7Virgili F, Pagana G, Bourne L, et al. Ferulic acid excretion as a marker of consumption of a French maritime pine ( Pinus maritima) bark extract [ J ]. Free Radic Biol Med, 2000, 28 ( 8 ) : 1249 - 1256.
8Ni Z, Mu Y, Gulati O. Treatment of melasma with Pycnogenol[ J]. Phytother Res, 2002, 16 (6) : 567 - 571.
9Bayeta E, Lau B. Pycnogenol inhibits generation of inflammatory me- diators in macrophages [ J ]. Nutr Res, 2000, 20 (2) : 249 - 259.
10Hosseini S, Lee J, Sepulveda RT, et al. A randomized, double - blind, placebo -controlled, prospective, 16 week crossover study to determine the role of Pycnogenol in modifying blood pressure in mild- ly hypertensive patients[J]. Nut Res, 2001, 21:1251 -1260.