5Balls, H., Moss B., and Irvine, K. 1989. The loss of submerged plants with eutrophication I. Experimental design, water chemistry, aquatic plant and phytoplankton biomass in experiments carried out in ponds in the Norfolk Broadland. Freshwat. Biol. 22: 71- 87.
6Bergman, E., Hansson, LA., Persson, A.,et al. 1999. Synthesis of theoretical and empirical experiences from nutrient and cyprinid reductions in Lake Ringsjon, Hydrobiologia, 404 : 145- 156.
7Denny, P. 1987. Mineral cycling by wetland plants-a review. Arch. Hydrobiol. Beih. Ergebn. Limnol. 27:1-25.
8de Nie, A. W. 1987. The decrease in aquatic vegetation in Europe and its consequences for fish populations. EIFAC Occasional Paper 19. FAO,Rome, 88.
9James, W.F., and Barko, J. W. 1990. Macrophyte influences on the zonation of sediment accretion and composition in a northtemperate reservoir.Arch. Hydrobiol. 2:129-142.
10Karabin, A., Karabin, JE., and Kornatowska, R. 1997. Eutrophication processes in a shallow, macrophyte-dominated lake-factors influencing zooplankton structure and density in Lake Luknajno (Poland), Hydrobiologia, 342/343:401-409.