<XML><RECORDS><RECORD><REFERENCE_TYPE>3</REFERENCE_TYPE><REFNUM>8583</REFNUM><AUTHORS><AUTHOR>Prosser,P.</AUTHOR></AUTHORS><YEAR>1994</YEAR><TITLE>Binary constraint satisfaction problems: Some are harder than others</TITLE><PLACE_PUBLISHED>European Conference on Artificial Intelligence (ECAI)</PLACE_PUBLISHED><PUBLISHER>N/A</PUBLISHER><PAGES>95-99</PAGES><LABEL>Prosser:1994:8583</LABEL><KEYWORDS><KEYWORD>phase transition</KEYWORD></KEYWORDS</RECORD></RECORDS></XML>