Isotopie tracing of groundwater at Žitný ostrov (SW Slovakia) P. P. Povinec, Z. Ženišová, R. Breier, M. Richtáriková and A. Šivo EPJ Web of Conferences, 24 (2012) 03004 Published online: 04 April 2012 DOI: 10.1051/epjconf/20122403004