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"The Alternation Hierarchy for Sublogarithmic Space is Infinite."
Burchard von Braunmühl, Romain Gengler, Robert Rettinger (1993)
- Burchard von Braunmühl, Romain Gengler, Robert Rettinger:
The Alternation Hierarchy for Sublogarithmic Space is Infinite. Comput. Complex. 3: 207-230 (1993)
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