Suad Alagic A Statically Typed, Temporal Object-Oriented Database Technology. 1469-1476 1995 78-D IEICE Trans. Inf. Syst. 11 http://search.ieice.org/bin/summary.php?id=e78-d_11_1469 db/journals/ieicet/ieicet78d.html#Alagic95