title: semantic assumptions and query evaluation in temporal databases. authors: sushil jajodia , xiaoyang sean wang , elisa bertino , claudio bettini. venue: sigmod conference. year: 1995.0
title: selectivity estimation in spatial databases. authors: swarup acharya , viswanath poosala , sridhar ramaswamy. venue: international conference on management of data. year: 1999.0