title: r-tree based indexing of now-relative bitemporal data. authors: simonas saltenis , christian s. jensen , giedrius slivinskas , rasa bliujute. venue: vldb. year: 1998
title: r-tree based indexing of now-relative bitemporal data. authors: rasa bliujute , christian s. jensen , simonas saltenis , giedrius slivinskas. venue: very large data bases. year: 1998