I often spend time trawling through google scholar and citeseer, always lots of gems to be found there. Here are three recent papers I thought worth highlighting that utlised Drools in an applied way.
A New Algorithm for the Acquisition of Knowledge from Scientific Literature in Specific Fields Based on Natural Language Comprehension
http://www.scirp.org/fileOperation/downLoad.aspx?path=IJIS20110200002_46860321.pdf&type=journal
PeerTrack: A Platform for Tracking and Tracing Objects in Large-Scaoe Traceability Networks
http://www.edbt.org/Proceedings/2012-Berlin/papers/edbt/a54-wu.pdf
Introducing a Rule-Based Architecture For WorkFlow Systems in Retail Supply Chain Management
http://bada.hb.se/bitstream/2320/10632/1/2011MAGI24.pdf
