Incorporating a Model Hierarchy into the ER Paradigm.

Jianhua Zhu Rodolphe Nassif Pankaj Goyal Pamela Drew Bertil Askelid Incorporating a Model Hierarchy into the ER Paradigm. 67-80 1990 ER db/conf/er/er90.html#ZhuNGDA90 conf/er/90 db/conf/er/ZhuNGDA90.html er90/ER90-P067.pdf journals/cacm/BatraHB90 journals/tods/Chen76 conf/er/79 conf/er/81 conf/er/83 ... conf/er/LenzeriniS83 ... conf/ifip/Maier89 journals/is/SchielFNC84 journals/cl/SchiffnerS79 journals/tods/SmithS77 journals/cacm/TeoreyWBK89 ...