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Smittenberg R.H, Baas M., Schouten S., Sinninghe-Damste J.S.  2005.  The demise of the alga Botryococcus Braunii from a Norwegian fjord is due to early eutrophication. The Holocene. 15:133-140.

Smittenberg R.H, Hopmans E.C, Schouten S., Sinninghe-Damste J.S.  2002.  Rapid isolation of biomarkers for compound specific radiocarbon dating using high-performance liquid chromatography and flow injection analysis - atmoospheric pressure chemical ionisation mass spectrometry. Journal of Chromatography A. 978:127-140.