conf/vldb/81 Hirotaka Sakai A Method for Defining Information Structures and Transactions in Conceptual Schema Design VLDB81/P225.PDF 225-234 1981 VLDB db/conf/vldb/vldb81.html#Sakai81 db/conf/vldb/Sakai81.html ... journals/tods/Chen76 ... ... conf/er/Sakai79 conf/sigmod/Sakai80 conf/er/SantosNF79 conf/er/ScheuermannSW79 ... journals/tods/SmithS77 journals/csur/TeoreyF80