Conecptual Modeling Using and Extended E-R Model (Abstract).

conf/vldb/91 Ramez Elmasri Conecptual Modeling Using and Extended E-R Model (Abstract). 67 1991 VLDB db/conf/vldb/vldb91.html#Elmasri91 db/conf/vldb/Elmasri91.html VLDB91/P067.PDF