M. Ruppenthal

Plasma tocopherol concentrations in response to supplemental vitamin E.

N. Dimitrov, D. Gilliland, W. Malone, 1991, The American journal of clinical nutrition.

Alteration of retinol-binding-protein concentrations by the synthetic retinoid fenretinide in healthy human subjects.

N. Dimitrov, M. Perloff, F. Minn, 1990, The American journal of clinical nutrition.

Changes of the central nervous system in herpes zoster

M. Ruppenthal, 2004, Acta Neuropathologica.