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@article{AL_1991_30_4_a3, author = {N. A. Serdyukova}, title = {On generalizations of purity}, journal = {Algebra i logika}, pages = {432--456}, publisher = {mathdoc}, volume = {30}, number = {4}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1991_30_4_a3/} }
N. A. Serdyukova. On generalizations of purity. Algebra i logika, Tome 30 (1991) no. 4, pp. 432-456. http://geodesic.mathdoc.fr/item/AL_1991_30_4_a3/