@article{19818,
  author       = {{Kleine Büning, Hans and Lettmann, Theodor and Mayr, Ernst W.}},
  issn         = {{0304-3975}},
  journal      = {{Theoretical Computer Science}},
  pages        = {{343--350}},
  title        = {{{Projections of vector addition system reachability sets are semilinear}}},
  doi          = {{10.1016/0304-3975(89)90055-8}},
  year         = {{1989}},
}