A hierarchy that does not collapse : alternations in low level space
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 28 (1994) no. 5, pp. 465-512.

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     author = {Geffert, Viliam},
     title = {A hierarchy that does not collapse : alternations in low level space},
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Geffert, Viliam. A hierarchy that does not collapse : alternations in low level space. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 28 (1994) no. 5, pp. 465-512. http://geodesic.mathdoc.fr/item/ITA_1994__28_5_465_0/

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