Dr. Klaus Wolkenstein

Wolkenstein, K., Gross, J. H., Falk, H., Schöler, H. F. (2006): Preservation of hypericin and related polycyclic quinone pigments in fossil crinoids. Proceedings of the Royal Society B: Biological Sciences, 273: 451-456.

Wolkenstein, K., Głuchowski, E., Gross, J. H., Marynowski, L. (2008): Hypericinoid pigments in millericrinids from the Lower Kimmeridgian of the Holy Cross Mountains (Poland). Palaios, 23: 773-777.

Wolkenstein, K., Schoefberger, W., Müller, N., Oji, T. (2009): Proisocrinins A–F, brominated anthraquinone pigments from the stalked crinoid Proisocrinus ruberrimus. Journal of Natural Products, 72: 2036-2039.

Wolkenstein, K., Gross, J. H., Falk, H. (2010): Boron-containing organic pigments from a Jurassic red alga. Proceedings of the National Academy of Sciences of the United States of America, 107: 19374-19378.