Nygaard, E., V. Ernstsen, C. S. Jacobsen, O. H. Jacobsen, R. K. Juhler, P. van der Keur, S. E. Olesen, J. Rasmussen, P. Rosenberg, and H. Vosgerau. “Pesticide Leaching in Danish Groundwater: Identification of Vulnerable Areas”. GEUS Bulletin, vol. 4, July 2004, pp. 25-28, doi:10.34194/geusb.v4.4774.