1. Effect of ionic strength on elution of aquatic humus in gel filtration chromatography;Aho;Arch. Hydrobiol.,1984
2. Humic Substances in Soil, Sediment and Water. Geochemistry, Isolation and Characterization,1985
3. Effect of pH on molecular weight and size of fulvic acids in drainage water from peaty grassland in NW Netherlands;De Haan;Plant Soil,1983
4. Zur Analytik von Elementbindungsformen in Bodenlösungen mit Gelchromatographie und chemischen Reaktionsdetektoren;Dunemann;Fresenius Z. Anal. Chem.,1984
5. Characterization of ambient levels of ultraviolet-absorbing dissolved humic materials in natural waters by aqueous liquid chromatography;Gardner,1983