db/conf/cikm/Derr93.html Marcia A. Derr Adaptive Query Optimization in a Deductive Database System. 206-215 CIKM1993/P206.pdf 1993 conf/cikm/93 CIKM db/conf/cikm/cikm93.html#Derr93 http://doi.acm.org/10.1145/170088.170134