1. BMVEL (Federal Ministry of Food, Agriculture and Consumer Protection), 2004. Reduktionsprogramm chemischer Pflanzenschutz. BMVEL, Referat 518, Berlin.
2. Burth, U., Gutsche, V., Freier, B., Roßberg, D., 2003. Defining the ‘necessary minimum’ of pesticide use. Electronic citation available at: http://europa.eu.int/comm/environment/ppps/pdf/bbareaction.pdf.
3. Pesticide persistence and bound residues in soil—regulatory significance;Craven;Environ. Pollut.,2005
4. Pesticides in rainfall in Europe;Dubus;Environ. Pollut.,2000
5. Pesticide concentrations in air and precipitation in The Netherlands;Duyzer;J. Environ. Monit.,2003