BUDAY, Štefan - FEDERIČOVÁ, Zuzana - VAJCÍKOVÁ, Ružena. Diversification of farm business. In Agricultural economics. - Prague : Institute of Agricultural and Food Information, 2009. ISSN 0139-570X, 2009, vol. 55, no. 2, s. 77-83. Dostupné na : <http://www.agriculturejournals.cz/publicFiles/04270.pdf>