title: database research at the university of oklahoma sigmod record 1999. authors: sirirut vanichayobon , leonard brown , ravi a. dirckze , sylvain guinepain , carlos sánchez , le gruenwald , brian summers. venue: nan. year: nan
title: the database group at national technical university of athens ( ntua ) corporate national technical univ. of athens. authors: nan. venue: acm sigmod record. year: 1995.0