@article{Pre:99,
  journal = {Fund. Inform.},
  volume = {40},
  title = {A relation between unambiguous regular expressions and abstract data
           types},
  year = {1999},
  fjournal = {Fundamenta Informaticae},
  pages = {53--77},
  number = {1},
  author = {Preoteasa, Viorel},
}