Kropsz, I. “APPLICATION OF CLASTER ANALYSIS METHODS AND MULTIDIMENSIONAL ANALYSIS CORRESPONDENCE TO THE ESTIMATIONS LEVEL OF INFRASTRUCTURE ON RURAL AREAS”. Journal of Agribusiness and Rural Development, Vol. 13, no. 3, Dec. 2009, pp. 129-37, http://www1.up.poznan.pl/jard/index.php/jard/article/view/885.