Jack Minker Dietmar Seipel Disjunctive Logic Programming: A Survey and Assessment. 472-511 2002 conf/birthday/2002kowalski1 Computational Logic: Logic Programming and Beyond http://link.springer.de/link/service/series/0558/bibs/2407/24070472.htm db/conf/birthday/kowalski2002-1.html#MinkerS02