AI approaches to the complexity of legal systems : AICOL 2013 International Workshops, AICOL-IV@IVR, Belo Horizonte, Brazil, July 21-27, 2013 and AICOL-V@SINTELNET-JURIX, Bologna, Italy, December 11, 2013, revised selected papers - Casanovas Romeu, Pompeu (Springer, 2014)