FOLTÝN, Ivan. Profitability development of key Czech agricultural commodities in the period 2002-2006. In Agricultural economics. - Prague : Institute of Agricultural and Food Information, 2009. ISSN 0139-570X, 2009, vol. 55, no. 4, s. 181-199. Available on Internet: <http://www.agriculturejournals.cz/publicFiles/06131.pdf>