@inproceedings{DBLP:conf/apsec/MartinS03,
  author    = {Andrew Martin and
               Andrew Simpson},
  title     = {Generalising the Z Schema Calculus: Database Schemas and
               Beyond},
  booktitle = {APSEC},
  year      = {2003},
  pages     = {28-37},
  ee        = {http://doi.ieeecomputersociety.org/10.1109/APSEC.2003.1254355},
  crossref  = {DBLP:conf/apsec/2003},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/apsec/2003,
  title     = {10th Asia-Pacific Software Engineering Conference (APSEC
               2003), 10-12 December 2003, Chiang Mai, Thailand},
  booktitle = {APSEC},
  publisher = {IEEE Computer Society},
  year      = {2003},
  isbn      = {0-7695-2011-1},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}