FernauHF03'

@article{DBLP:journals/tcs/FernauHF03,
  author    = {Henning Fernau and
               Markus Holzer and
               Rudolf Freund},
  title     = {Hybrid modes in cooperating distributed grammar systems:
               combining the t-mode with the modes le k and =k},
  journal   = {Theor. Comput. Sci.},
  volume    = {1-3},
  number    = {299},
  year      = {2003},
  pages     = {633-662},
  ee        = {http://dx.doi.org/10.1016/S0304-3975(02)00541-8},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}