Thomas Eiter Michael Fink Giuliana Sabbatini Hans Tompits Reasoning about Evolving Nonmonotonic Knowledge Bases. 407-421 2001 conf/lpar/2001 LPAR http://link.springer.de/link/service/series/0558/bibs/2250/22500407.htm db/conf/lpar/lpar2001.html#EiterFST01