no. 4
Sublogarithmic ∑ 2 -space is not closed under complement and other separation results
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 27 (1993) no. 4, pp. 349-366. 
@article{ITA_1993__27_4_349_0,
     author = {Geffert, V.},
     title = {Sublogarithmic $\sum _2$-space is not closed under complement and other separation results},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {349--366},
     publisher = {EDP-Sciences},
     volume = {27},
     number = {4},
     year = {1993},
     mrnumber = {1238056},
     zbl = {0804.68047},
     language = {en},
     url = {http://archive.numdam.org/item/ITA_1993__27_4_349_0/}
}
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Geffert, V. Sublogarithmic $\sum _2$-space is not closed under complement and other separation results. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 27 (1993) no. 4, pp. 349-366. http://archive.numdam.org/item/ITA_1993__27_4_349_0/

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