Authors: Schempp, CM Winghofer, B Langheinrich, M Schopf, E Simon, JC

Citation: Cm. Schempp et al., Hypericin levels in human serum and interstitial skin blister fluid after oral single-dose and steady-state administration of Hypericum perforatum extract (St. John's wort), SKIN PH APP, 12(5), 1999, pp. 299-304

Authors: Langheinrich, M Nakamura, A Abe, N Kamba, T Koseki, Y

Citation: M. Langheinrich et al., Unintrusive customization techniques for Web advertising, COMPUT NET, 31(11-16), 1999, pp. 1259-1272

Authors: Johne, A Brockmoller, J Bauer, S Maurer, A Langheinrich, M Roots, I

Citation: A. Johne et al., Pharmacokinetic interaction of digoxin with an herbal extract from St John's wort (Hypericum perforatum), CLIN PHARM, 66(4), 1999, pp. 338-345