The Lattice Structure of Entity Set.

@inproceedings{DBLP:conf/er/ChenL86,
  author    = {Peter P. Chen and
               Ming-rui Li},
  editor    = {Stefano Spaccapietra},
  title     = {The Lattice Structure of Entity Set},
  booktitle = {Entity-Relationship Approach: Ten Years of Experience in Information
               Modeling, Proceedings of the Fifth International Conference on
               Entity-Relationship Approach, Dijon, France, November 17-19,
               1986},
  publisher = {North-Holland},
  year      = {1986},
  isbn      = {0-444-70255-5},
  pages     = {217-229},
  ee        = {db/conf/er/ChenL86.html},
  crossref  = {DBLP:conf/er/86},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

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Peter P. Chen: The Entity-Relationship Model - Toward a Unified View of Data. ACM Trans. Database Syst. 1(1): 9-36(1976) BibTeX

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Peter P. Chen: An Algebra for a Directional Binary Entity-Relationship Model. ICDE 1984: 37-40 BibTeX

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Peter Scheuermann, Gerd Schiffner, H. Weber: Abstraction Capabilities and Invariant Properties Modelling within the Entity-Relationship Approach. ER 1979: 121-140 BibTeX

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John Miles Smith, Diane C. P. Smith: Database Abstractions: Aggregation and Generalization. ACM Trans. Database Syst. 2(2): 105-133(1977) BibTeX

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