@TechReport{coregrid:tr0132,
      AUTHOR = {Ostermann, Simon and Prodan, Radu and Fahringer, Thomas and Iosup, Alexandru and Epema, Dick},
      TITLE = {On the Characteristics of Grid Workflows},
      YEAR = {2008},
      MONTH = {April},
      NUMBER = {TR-0132},
      INSTITUTION = {Institute on Grid Information, Resource and Workflow Monitoring Services, CoreGRID - Network of Excellence},
      URL = {http://www.coregrid.net/mambo/images/stories/TechnicalReports/tr-0132.pdf},
      KEYWORDS = {WP5}
}