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@article{AL_1977_16_2_a6, author = {I. P. Shestakov}, title = {A problem of {\v{S}ir\v{s}ov}}, journal = {Algebra i logika}, pages = {227--246}, publisher = {mathdoc}, volume = {16}, number = {2}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1977_16_2_a6/} }
I. P. Shestakov. A problem of \v{S}ir\v{s}ov. Algebra i logika, Tome 16 (1977) no. 2, pp. 227-246. http://geodesic.mathdoc.fr/item/AL_1977_16_2_a6/