@inproceedings{DBLP:conf/sas/CousotC91a,
  author    = {Patrick Cousot and
               Radhia Cousot},
  title     = {Comparison of the Galois Connection and Widening/Narrowing
               Approaches to Abstract Interpretation},
  booktitle = {JTASPEFT/WSA},
  year      = {1991},
  pages     = {107-110},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}