@article{106595, author = {Athanossios Tzouvaras}, title = {Definability degrees for classes in the alternative set theory}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {029}, year = {1988}, pages = {41-48}, zbl = {0646.03049}, mrnumber = {937547}, language = {en}, url = {http://dml.mathdoc.fr/item/106595} }
Tzouvaras, Athanossios. Definability degrees for classes in the alternative set theory. Commentationes Mathematicae Universitatis Carolinae, Tome 029 (1988) pp. 41-48. http://gdmltest.u-ga.fr/item/106595/
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