7Haslam, S M. 1972. Biological flora of the British Isles, No. 128 : Phragmites communis Trin. Journal of Ecology, 60: 585 - 610.
8Hejny, S & Z Hroudova. 1987. Plant adaptations to shallow water habitats. Archlv fuer Hydrobiologie-Advances in Limnology, 27:157 - 166.
9Hecky, R E & P Kilman. 1988. Nutrient limitation of phytoplankton in freshwater and marine environment: a review of recent evidence of the effects of enrichment, Limnology and Oceanography, 33 : 796 - 822.
10Koerselman, W & A F M Meuleman. 1996. The vegetation N:P ratio: a new tool to detect the nature of nutrient limitation. Journal of Applied Ecology, 33:1441 - 1450.