http://doi.acm.org/10.1145/130868.130877 db/journals/sigmod/Kuntz92.html Michel Kuntz The Gist of GIUKU: Graphical Interactive Intelligent Utilities for Knowledgeable Users of Data Base Systems. 58-64 sigmodR/21-1/P058.pdf 1992 21 SIGMOD Record 1 db/journals/sigmod/sigmod21.html#Kuntz92