KRÍŽOVÁ, Slávka. Selected food verticals and their impact on prices of food products. In Agricultural economics. - Prague : Institute of Agricultural and Food Information, 2009. ISSN 0139-570X, 2009, vol. 55, no. 2, s. 94-101. Dostupné na : <http://www.agriculturejournals.cz/publicFiles/04263.pdf>