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2. Positional faithfulness and voicing assimilation in Optimality Theory;Lombardi;NLLT,1999
3. Jun Jongho (1995). Perceptual and articulatory factors in place assimilation: an Optimality-theoretic approach. PhD dissertation, University of California, Los Angeles.
4. Variation in Finnish vowel harmony: an OT account;Ringen;NLLT,1999