@inproceedings{DBLP:conf/er/NishiyamaO89,
  author    = {Satoshi Nishiyama and
               Sadao Obana},
  title     = {The E-R Editor: an Editor for Database Conceptual Schema
               Design based on E-R Model},
  booktitle = {ER},
  year      = {1989},
  pages     = {155-169},
  crossref  = {DBLP:conf/er/89},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/er/89,
  editor    = {Frederick H. Lochovsky},
  title     = {Entity-Relationship Approach to Database Design and Querying,
               Proceedings of the Eight International Conference on Enity-Relationship
               Approach, Toronto, Canada, 18-20 October, 1989},
  publisher = {North-Holland},
  year      = {1990},
  isbn      = {0-444-88716-4},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}