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@article{10_4064_fm_96_3_173_175, author = {Michael Bix}, title = {A geometric filtration of ${N_{\ast}}^{Z_2}$}, journal = {Fundamenta Mathematicae}, pages = {173--175}, publisher = {mathdoc}, volume = {96}, number = {3}, year = {1977}, doi = {10.4064/fm-96-3-173-175}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-96-3-173-175/} }
Michael Bix. A geometric filtration of ${N_{\ast}}^{Z_2}$. Fundamenta Mathematicae, Tome 96 (1977) no. 3, pp. 173-175. doi : 10.4064/fm-96-3-173-175. http://geodesic.mathdoc.fr/articles/10.4064/fm-96-3-173-175/
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