@article{DBLP:journals/fuin/AtanasiuMM02,
  author    = {Adrian Atanasiu and
               Carlos Mart\'{\i}n-Vide and
               Alexandru Mateescu},
  title     = {On the Injectivity of the Parikh Matrix Mapping.},
  journal   = {Fundam. Inform.},
  volume    = {49},
  number    = {4},
  year      = {2002},
  pages     = {289-299},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}