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"The Undecidability of the Pi4-Theory for the R. E. WTT and ..."
Steffen Lempp, André Nies (1995)
- Steffen Lempp, André Nies:
The Undecidability of the Pi4-Theory for the R. E. WTT and Turing Degrees. J. Symb. Log. 60(4): 1118-1136 (1995)
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