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@article{DAN_1991_319_1_a10, author = {A. I. Omarov}, title = {A syntactical description of filtering formulas}, journal = {Doklady Akademii Nauk}, pages = {58--60}, publisher = {mathdoc}, volume = {319}, number = {1}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1991_319_1_a10/} }
A. I. Omarov. A syntactical description of filtering formulas. Doklady Akademii Nauk, Tome 319 (1991) no. 1, pp. 58-60. http://geodesic.mathdoc.fr/item/DAN_1991_319_1_a10/