Characterization of sediment pore-water dissolved organic matter of lakes by high performance size exclusion chromatographyLepane, Viia; Malashenko, Olga; Leeben, Aina9th Nordic IHSS Symposium on Abundance and Functions of Natural Organic Matter Species in Soil and Water : Sundsvall, Sweden, 2003 : abstracts2003 / p. 8P The interactions of metal cations with different humic substancesÜbner, Monika; Treumann, Maili; Lopp, Margus9th Nordic IHSS Symposium on Abundance and Functions of Natural Organic Matter Species in Soil and Water : Sundsvall, Sweden, 2003 : abstracts2003 / p. 53P