Polynomial-time identification of very simple grammars from positive data

@article{Yokomori2003PolynomialtimeIO,
  title={Polynomial-time identification of very simple grammars from positive data},
  author={Takashi Yokomori},
  journal={Theor. Comput. Sci.},
  year={2003},
  volume={298},
  pages={179-206}
}