AI approaches to the complexity of legal systems : models and ethical challenges for legal systems, legal language and legal ontologies, argumentation and software agents : International Workshop AICOL-III, held as part of the 25th IVR Congress, Frankfurt am Main, Germany, August 15-16, 2011 : revised selected papers - Palmirani, Monica; Pagallo, Ugo; Casanovas Romeu, Pompeu; Sartor, Giovanni (Springer, 2012)