Stavros Christodoulakis Anil K. Garg C. C. Gotlieb Geovane Cayres Magalhães Database Design Research at the University of Toronto. 42-48 1982 http://sites.computer.org/debull/82MAR-CD.pdf 5 IEEE Database Eng. Bull. 1 db/journals/debu/debu5.html#ChristodoulakisGGM82