VILČEK, Jozef - HRONEC, Ondrej. Agro-economic potentials of the East Slovak Lowland agricultural soils. In Agricultural economics : an international journal = mezinárodní vědecký časopis. - Prague : Institute of Agricultural and Food Information, 2004. ISSN 0139-570X, 2004, vol. 50, no. 2, s. 83-87. Available on Internet: <http://www.agriculturejournals.cz/publicFiles/58693.pdf>