title: the database research group at eth zurich. authors: hans-jörg schek , moira c. norrie , gerhard weikum , stephen blott. venue: sigmod record. year: 1994
title: database research at the university of oklahoma. authors: le gruenwald , leonard brown , ravi dirckze , sylvain guinepain , carlos sanchez , brian summers , sirirut vanichayobon. venue: acm sigmod record. year: 1999