SmithS77'

@article{DBLP:journals/tods/SmithS77,
  author    = {John Miles Smith and
               Diane C. P. Smith},
  title     = {Database Abstractions: Aggregation and Generalization},
  journal   = {ACM Trans. Database Syst.},
  volume    = {2},
  number    = {2},
  year      = {1977},
  pages     = {105-133},
  ee        = {http://doi.acm.org/10.1145/320544.320546},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}