1. Developments in Hydrobiology;T Ahl,1988
2. Andersson, P., 1991. Annual variations of dissolved and particulate Fe, Mn, major components in stream-and lake-waters in central Sweden. Thesis Institute of geology and geochemistry, Stockholm University, Stockholm, Sweden. 284: 1–66.
3. Bale, A. J. & A. W. Morris, 1981. Laboratory simulation of chemical processes induced by estuarine mixing: the behaviour of iron and phosphate in estuaries. Estuar. coast shelf Sci. 13: 1–10.
4. Bloesch, J. & N. M. Burns, 1980. A critical review of sedimentation trap technique. Schweiz. Z. Hydrol. 42: 15–55.
5. Boström, B., M. Jansson & C. Forsberg, 1982. Phosphorus release from lake sediment. Arch. Hydrobiologia 18:5–59.