@TechReport{coregrid:tr0077,
      AUTHOR = {Gounaris, Anastasios and Paton, Norman W. and Sakellariou, Rizos and Fernandes, Alvaro A.A. and Smith, Jim and Watson, Paul},
      TITLE = {Adapting to Changing Resource Performance in Grid Query Processing},
      YEAR = {2007},
      MONTH = {March},
      NUMBER = {TR-0077},
      INSTITUTION = {Institute on Knowledge and Data Management, CoreGRID - Network of Excellence},
      URL = {http://www.coregrid.net/mambo/images/stories/TechnicalReports/tr-0077.pdf},
      KEYWORDS = {WP2}
}