http://doi.acm.org/10.1145/166635.166659 db/journals/sigmod/Kline93.html Nick Kline An Update of the Temporal Database Bibliography. 66-80 sigmodR/22-4/P066.pdf 1993 22 SIGMOD Record 4 db/journals/sigmod/sigmod22.html#Kline93 http://www.acm.org/sigmod/record/issues/9312/tempdb.bib.ps