title: database research at the university of oklahoma. authors: l gruenwald , l brown , r dirckze , s guinepain , c sсnchez , b summers , s vanichayobon. venue: sigmod record. year: 1999
title: database research activities at the university of wisconsin. authors: h boral , dj dewitt , rh katz , a klug. venue: acm sigmod record ,. year: 1982.0