@inproceedings{DBLP:conf/er/Mattos88,
  author    = {Nelson Mendon\c{c}a Mattos},
  title     = {Abstraction Concepts: The Basis for Data and Knowledge Modeling},
  booktitle = {ER},
  year      = {1988},
  pages     = {473-492},
  crossref  = {DBLP:conf/er/88},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/er/88,
  editor    = {Carlo Batini},
  title     = {Entity-Relationship Approach: A Bridge to the User, Proceedings
               of the Seventh International Conference on Enity-Relationship
               Approach, Rome, Italy, November 16-18, 1988},
  publisher = {North-Holland},
  year      = {1989},
  isbn      = {0-444-87453-4},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}