Rodolfo Villarroel Eduardo Fernández-Medina Mario Piattini Juan Trujillo A UML 2.0/OCL Extension for Designing Secure Data Warehouses. 2006 38 Journal of Research and Practice in Information Technology 1 http://www.jrpit.acs.org.au/jrpit/JRPITVolumes/JRPIT38/JRPIT38.1.31.pdf db/journals/acj/acj38.html#VillarroelFP06