Kalinowski, Sławomir, and Władysława Łuczka-Bakuła. 2007. “The Consumption Structure of Food Articles in Impoverished Households - the Example of the Wielkopolskie Province”. Journal of Agribusiness and Rural Development 6 (385), 51-66. http://www1.up.poznan.pl/jard/index.php/jard/article/view/958.