db/conf/krdb/StarrCFW98.html Barbara Starr Vinay K. Chaudhri Adam Farquhar Richard J. Waldinger Knowledge-Intensive Query Processing. 18.1-18.6 KRDB1998/X18.pdf 1998 conf/krdb/98 KRDB db/conf/krdb/krdb98.html#StarrCFW98 http://sunsite.informatik.rwth-aachen.de/Publications/CEUR-WS/Vol-10/paper18.ps