1. Altruizmus, social potential and regional development
:KOĽVEKOVÁ, Gabriela. Altruizmus, social potential and regional development. In Agricultural economics : an international journal = mezinárodní vědecký časopis. - Prague : Institute of Agricultural and Food Information, 2004. ISSN 0139-570X, 2004, vol. 50, no. 10, s. 450-456. Available on Internet: <http://www.agriculturejournals.cz/publicFiles/58781.pdf>