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@article{10_4064_fm_108_1_1_5, author = {David Sprows}, title = {Subhomeotopy groups of the 2-sphere with n holes}, journal = {Fundamenta Mathematicae}, pages = {1--5}, publisher = {mathdoc}, volume = {108}, number = {1}, year = {1980}, doi = {10.4064/fm-108-1-1-5}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-108-1-1-5/} }
David Sprows. Subhomeotopy groups of the 2-sphere with n holes. Fundamenta Mathematicae, Tome 108 (1980) no. 1, pp. 1-5. doi : 10.4064/fm-108-1-1-5. http://geodesic.mathdoc.fr/articles/10.4064/fm-108-1-1-5/
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