Dieter Hutter Heiko Mantel Ina Schaefer Axel Schairer Security of multi-agent systems: A case study on comparison shopping. 303-332 2007 5 J. Applied Logic 2 http://dx.doi.org/10.1016/j.jal.2005.12.015 db/journals/japll/japll5.html#HutterMSS07