Thomas Eiter Michael Fink Giuliana Sabbatini Hans Tompits An Update Front-End for Extended Logic Programs. 397-401 2001 conf/lpnmr/2001 LPNMR http://link.springer.de/link/service/series/0558/bibs/2173/21730397.htm db/conf/lpnmr/lpnmr2001.html#EiterFST01