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"The Half-Levels of the FO2 Alternation Hierarchy."
Lukas Fleischer, Manfred Kufleitner, Alexander Lauser (2017)
- Lukas Fleischer, Manfred Kufleitner, Alexander Lauser:
The Half-Levels of the FO2 Alternation Hierarchy. Theory Comput. Syst. 61(2): 352-370 (2017)
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