Larry Kerschberg Richard Baum J. Hung KORTEX: An Expert Database System Shell for a Knowledge-Based Enity Relationship Model. 255-268 1989 ER db/conf/er/er89.html#KerschbergBH89 conf/er/89 er89/ER89-P255.pdf db/conf/er/KerschbergBH89.html ... journals/tods/Chen76 ... journals/csur/HullK87 conf/eds/84 conf/eds/86 conf/eds/88 conf/ds/PotterK86 journals/csur/PeckhamM88 journals/csur/TeoreyYF86 journals/cacm/WeitzelK89