1. Akao T, Che Q-M, Kobashi K, Yang L, Hattori M, Namba T (1994) Isolation of a human intestinal anaerobe, Bifidobacterium sp. strain SEN, capable of hydrolyzing sennosides to sennidins. Appl Environ Microbiol 60: 1041–1043
2. Akao T, Che Q-M, Kobashi K, Hattori M, Namba T (1996) A purgative action of barbaloin is induced by Eubacterium sp. strain BAR, a human intestinal anaerobe, capable of transforming barbaloin to aloe-emodin anthrone. Biol Pharm Bull 19: 136–138
3. Alarcón de la Lastra C, Martin MJ, Motilva V, Jiménez M, La Casa C, López A (1995) Gastroprotection induced by silymarin, the hepatoprotective principle of Silybum marianum in ischemia-reperfusion mucosal injury: role of neutrophils. Planta Med 61: 116–119
4. American herbal pharmacopoeia and therapeutic compendium (1997) St. John’s wort–Hypericum perforatum. Quality control, analytical and therapeutic monograph, pp 1–32
5. Ammon HPT, Kaul R (1994) Herz-Kreislauf-Wirkungen von Crataegusextrakten, Flavonoiden und Procyanidinen. Dtsch Apoth Ztg 134: 2433–2436,2521–2525, 2631–2636