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Stabler, E. P., Collier, T. C., Kobele, G. M., Lee, Y., Lin, Y., Riggle, J., Yao, Y., and Taylor, C. E. (2003) The learning and emergence of mildly context sensitive languages. In ECAL03, pages 525--534.

Kobele,Riggle,Collier,Lee,Lin,Yao,Taylor,Stabler, Grounding As Learning, 2003