Mariette Sérayet Pierre Drap Odile Papini Encoding the Revision of Partially Preordered Information in Answer Set Programming. 421-433 2009 ECSQARU http://dx.doi.org/10.1007/978-3-642-02906-6_37 conf/ecsqaru/2009 db/conf/ecsqaru/ecsqaru2009.html#SerayetDP09