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Frank Henry, Multivariate Analysis and Ordinal Data, American Sociological Review, Vol. 47, No. 2 (Apr., 1982), pp. 299-304 ...
Multivariate Exploratory Analysis of Ordinal Data in Ecology: Pitfalls, Problems and Solutions, Journal of Vegetation Science, Vol. 16, No. 5 (Oct., 2005), pp. 497-510 ...