@inproceedings{DBLP:conf/ibm/SchekS90,
  author    = {Hans-J{\"o}rg Schek and
               Marc H. Scholl},
  title     = {Evolution of Data Models},
  booktitle = {IBM Symposium: Database Systems of the 90s},
  year      = {1990},
  pages     = {135-153},
  ee        = {http://dx.doi.org/10.1007/3-540-53397-4_35},
  crossref  = {DBLP:conf/ibm/1990},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/ibm/1990,
  editor    = {Albrecht Blaser},
  title     = {Database Systems of the 90s, International Symposium, M{\"u}ggelsee,
               Berlin, Germany, November 5-7, 1990, Proceedings},
  booktitle = {IBM Symposium: Database Systems of the 90s},
  publisher = {Springer},
  series    = {Lecture Notes in Computer Science},
  volume    = {466},
  year      = {1990},
  isbn      = {3-540-53397-4},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}