1999

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Estimators for Stochastic “Unification-Based” Grammars
Mark Johnson | Stuart Geman | Stephen Canon | Zhiyi Chi | Stefan Riezler
Proceedings of the 37th Annual Meeting of the Association for Computational Linguistics

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Statistical Properties of Probabilistic Context-Free Grammars
Zhiyi Chi
Computational Linguistics, Volume 25, Number 1, March 1999

1998

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Estimation of Probabilistic Context-Free Grammars
Zhiyi Chi | Stuart Geman
Computational Linguistics, Volume 24, Number 2, June 1998