Yannis Dimopoulos Pavlos Moraitis Leila Amgoud Theoretical and Computational Properties of Preference-based Argumentation. 463-467 2008 ECAI http://dx.doi.org/10.3233/978-1-58603-891-5-463 conf/ecai/2008 db/conf/ecai/ecai2008.html#DimopoulosMA08