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@article{IM2_2013_77_3_a8, author = {J. Wu and R. V. Mikhailov}, title = {Homotopy groups as centres of finitely presented groups}, journal = {Izvestiya. Mathematics }, pages = {581--593}, publisher = {mathdoc}, volume = {77}, number = {3}, year = {2013}, language = {en}, url = {http://geodesic.mathdoc.fr/item/IM2_2013_77_3_a8/} }
J. Wu; R. V. Mikhailov. Homotopy groups as centres of finitely presented groups. Izvestiya. Mathematics , Tome 77 (2013) no. 3, pp. 581-593. http://geodesic.mathdoc.fr/item/IM2_2013_77_3_a8/
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