AhoSU79'

@article{DBLP:journals/tods/AhoSU79,
  author    = {Alfred V. Aho and
               Yehoshua Sagiv and
               Jeffrey D. Ullman},
  title     = {Efficient Optimization of a Class of Relational Expressions},
  journal   = {ACM Trans. Database Syst.},
  volume    = {4},
  number    = {4},
  year      = {1979},
  pages     = {435-454},
  ee        = {http://doi.acm.org/10.1145/320107.320112},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}