Rasa Bliujute Christian S. Jensen Simonas Saltenis Giedrius Slivinskas Light-Weight Indexing of General Bitemporal Data. 125-138 2000 SSDBM http://www.computer.org/proceedings/ssdbm/0686/06860125abs.htm db/conf/ssdbm/ssdbm2000.html#BliujuteJSS00