PernulT91'

@inproceedings{DBLP:conf/er/PernulT91,
  author    = {G{\"u}nther Pernul and
               A. Min Tjoa},
  title     = {A View Integration Approach for the Design of Multilevel
               Security},
  booktitle = {ER},
  year      = {1991},
  pages     = {483-509},
  crossref  = {DBLP:conf/er/91},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/er/91,
  editor    = {Toby J. Teorey},
  title     = {Proceedings of the 10th International Conference on Entity-Relationship
               Approach (ER'91), 23-25 October, 1991, San Mateo, California,
               USA},
  publisher = {ER Institute},
  year      = {1991},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}