@article{DBLP:journals/tcs/KariS08,
  author    = {Lila Kari and
               Petr Sos\'{\i}k},
  title     = {On the weight of universal insertion grammars},
  journal   = {Theor. Comput. Sci.},
  volume    = {396},
  number    = {1-3},
  year      = {2008},
  pages     = {264-270},
  ee        = {http://dx.doi.org/10.1016/j.tcs.2008.01.037},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}