{Project}     Biologische Regulierung der Ackerkratzdistel.  [Biocontrol of the creeping thistle.]   Runs 2003 - 2005.      Project Leader(s): Wyss, Eric, Research Institute of Organic Agriculture (FiBL), CH-5070 Frick .     

   Dierauer, Hansueli; Kranzler, Andreas; Uehlinger, Gabriela and Lindenthal, Thomas    (2004) Ackerkratzdistel. Wie regulieren im Biobetrieb?  [Thistles - how to manage them in organic farming.]   Merkblatt. Forschungsinstitut für biologischen Landbau, Frick.