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@article{TM_1991_196_a13, author = {K. A. Sitnikov and E. E. Skurikhin}, title = {Homology on presheaves of sets}, journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova}, pages = {156--160}, publisher = {mathdoc}, volume = {196}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TM_1991_196_a13/} }
K. A. Sitnikov; E. E. Skurikhin. Homology on presheaves of sets. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Discrete geometry and topology, Tome 196 (1991), pp. 156-160. http://geodesic.mathdoc.fr/item/TM_1991_196_a13/