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2. The use of ranks to avoid the assumption of normality implicit in the analysis of variance;Friedman;J. Am. Stat. Assoc.,1937
3. Salinity-Plants;Gessner,1971
4. Influence of habitat on the chemical composition of Ascophyllum nodosum;Haug;Nature (London),1958
5. Influence of environmental parameters on intraspecific variation in Fucus vesiculosus;Jordan;Mar. Biol.,1972