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@article{AL_1994_33_2_a3, author = {S. I. Mardaev}, title = {Convergence of positive schemes in ${\rm S}4$ and ${\rm}, journal = {Algebra i logika}, pages = {166--178}, publisher = {mathdoc}, volume = {33}, number = {2}, year = {1994}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1994_33_2_a3/} }
S. I. Mardaev. Convergence of positive schemes in ${\rm S}4$ and ${\rm. Algebra i logika, Tome 33 (1994) no. 2, pp. 166-178. http://geodesic.mathdoc.fr/item/AL_1994_33_2_a3/