<XML><RECORDS><RECORD><REFERENCE_TYPE>3</REFERENCE_TYPE><REFNUM>9173</REFNUM><AUTHORS><AUTHOR>Macdonald,C.</AUTHOR><AUTHOR>Ounis,I.</AUTHOR></AUTHORS><YEAR>2009</YEAR><TITLE>On Perfect Document Rankings for Expert Search.</TITLE><PLACE_PUBLISHED>In Proceedings of the 32nd Annual ACM SIGIR Conference, Boston, USA, July 2009.</PLACE_PUBLISHED><PUBLISHER>ACM Press</PUBLISHER><LABEL>Macdonald:2009:9173</LABEL><KEYWORDS><KEYWORD>Expert search; Perfect ranking; Evaluation</KEYWORD></KEYWORDS</RECORD></RECORDS></XML>