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Tzouvaras, Athanossios. Definability degrees for classes in the alternative set theory. Commentationes Mathematicae Universitatis Carolinae, Tome 29 (1988) no. 1, pp. 41-48. http://geodesic.mathdoc.fr/item/CMUC_1988_29_1_a3/
@article{CMUC_1988_29_1_a3,
author = {Tzouvaras, Athanossios},
title = {Definability degrees for classes in the alternative set theory},
journal = {Commentationes Mathematicae Universitatis Carolinae},
pages = {41--48},
year = {1988},
volume = {29},
number = {1},
mrnumber = {937547},
zbl = {0646.03049},
language = {en},
url = {http://geodesic.mathdoc.fr/item/CMUC_1988_29_1_a3/}
}
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