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This work represents re%ision and extension of research reported in [12] and [7].
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Kasper, R.T., Rounds, W.C. The logic of unification in grammar. Linguist Philos 13, 35–58 (1990). https://doi.org/10.1007/BF00630516
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DOI: https://doi.org/10.1007/BF00630516