title: database research at the university of illinois at urbana-champaign 2002. authors: chengxiang zhai , marianne winslett , yuanyuan zhou , kevin chen-chuan chang , jiawei han , anhai doan. venue: sigmod record. year: nan
title: the database group at university of hagen. authors: gunter schlageter , thomas berkel , eberhard heuel , silke mittrach , andreas scherer , wolfgang wilkes. venue: acm sigmod record. year: 1995.0