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@article{MMO_1957_6_a3, author = {A. A. Lyapunov}, title = {On operations on sets admitting transfinite indexes}, journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva}, pages = {195--230}, publisher = {mathdoc}, volume = {6}, year = {1957}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MMO_1957_6_a3/} }
A. A. Lyapunov. On operations on sets admitting transfinite indexes. Trudy Moskovskogo matematičeskogo obŝestva, Trudy Moskovskogo Matematicheskogo Obshchestva, Tome 6 (1957), pp. 195-230. http://geodesic.mathdoc.fr/item/MMO_1957_6_a3/