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@article{DAN_1973_210_3_a2, author = {V. B. Kudryavtsev}, title = {On the functional system $\mathscr{P}_\Sigma$}, journal = {Doklady Akademii Nauk}, pages = {521--522}, publisher = {mathdoc}, volume = {210}, number = {3}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1973_210_3_a2/} }
V. B. Kudryavtsev. On the functional system $\mathscr{P}_\Sigma$. Doklady Akademii Nauk, Tome 210 (1973) no. 3, pp. 521-522. http://geodesic.mathdoc.fr/item/DAN_1973_210_3_a2/