%0 Conference Paper %B in Proc. of the workshop on MAS Problem Spaces and Their Implications to Achieving Globally Coherent Behavior (AAMAS 02) %D 2002 %T Importance and Properties of Roles in MAS Organization: A review of methodologies and systems %A I. Partsakoulakis %A G. Vouros %B in Proc. of the workshop on MAS Problem Spaces and Their Implications to Achieving Globally Coherent Behavior (AAMAS 02) %C Bologna, Italy %8 00/2002