C. E. W. Steinberg, N. Saul, K. Pietsch, T. Meinelt, S. Rienau, and R. Menzel, “Dissolved Humic Substances Facilitate Fish Life in Extreme Aquatic Environments and Have the Potential to Extend the Lifespan of Caenorhabditis Elegans”, AES, vol. 1, Sep. 2007.