@article{DBLP:journals/sigplan/MarriottS89,
  author    = {Kim Marriott and
               Harald S{\o}ndergaard},
  title     = {On prolog and the occur check problem},
  journal   = {SIGPLAN Notices},
  volume    = {24},
  number    = {5},
  year      = {1989},
  pages     = {76-82},
  ee        = {http://doi.acm.org/10.1145/66068.66075},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}