Fabisiak, A., and A. Kaźmierczak. “Evaluation of Consumption Level of Employee and Farmer Households in Poland Using Synthetic Index of Consumption Level”. Journal of Agribusiness and Rural Development, Vol. 24, no. 2, Dec. 2012, pp. 45-56, http://www1.up.poznan.pl/jard/index.php/jard/article/view/517.