1. Augstein, J.: Down with the Patent Lobby or how the European Patent Office has mutated to controlling engine of the European Economy, Diploma Thesis, University of Linz (2008)
2. http://research.nii.ac.jp/ntcir
3. http://www.clef-campaign.org
4. http://www.ir-facility.org/the_irf/trec_chem.htm
5. Piroi, F., Roda, G., Zenz, V.: CLEF-IP 2009, Track Guidelines (2009)