Bundy84'

@article{DBLP:journals/toms/Bundy84,
  author    = {Alan Bundy},
  title     = {A generalized interval package and its use for semantic
               checking},
  journal   = {ACM Trans. Math. Softw.},
  volume    = {10},
  number    = {4},
  year      = {1984},
  pages     = {397-409},
  ee        = {http://doi.acm.org/10.1145/2701.2702},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}