Underwood, A.J (1997) Experiments in ecology: their logical design and interpretation using analysis of variance. Cambridge University Press. 504pp. null
Clarke, K.R. & Warwick, R. M., (2001) Change in Marine Communities. An approach to statistical analysis and interpretation. National Environment Research Council, U. K., 144p. null
Quinn, G. P. & Keough, M.J. (2002) Experimental design and data analysis for biologists. Cambridge University Press. 537pp null
