TVRDOŇ, Jiří. Economic aspects of rural areas sustainable development. In Agricultural economics : an international journal = mezinárodní vědecký časopis. - Prague : Institute of Agricultural and Food Information, 2005. ISSN 0139-570X, 2005, vol. 51, no. 1, s. 12-19. Available on Internet: <http://www.agriculturejournals.cz/publicFiles/58213.pdf>