Julien Gobeill Douglas Teodoro Emilie Pasche Patrick Ruch Report on the TREC 2009 Experiments: Chemical IR Track. 2009 TREC http://trec.nist.gov/pubs/trec18/papers/bitem.CHEM.pdf conf/trec/2009 db/conf/trec/trec2009.html#GobeillTPR09