Spectrofluorimetric study of dissolved organic matter in River Salaca (Latvia) basin watersM. Klavins, I. Kokorite, L. Ansone, L. Eglite, V. Rodinov and G. SpringeKnowl. Managt. Aquatic Ecosyst., 404 (2012) 06DOI: https://doi.org/10.1051/kmae/2011086