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@article{10_4064_fm_89_3_261_263, author = {P. Doyle}, title = {A topological collapse number for all spaces}, journal = {Fundamenta Mathematicae}, pages = {261--263}, publisher = {mathdoc}, volume = {89}, number = {3}, year = {1975}, doi = {10.4064/fm-89-3-261-263}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-89-3-261-263/} }
P. Doyle. A topological collapse number for all spaces. Fundamenta Mathematicae, Tome 89 (1975) no. 3, pp. 261-263. doi : 10.4064/fm-89-3-261-263. http://geodesic.mathdoc.fr/articles/10.4064/fm-89-3-261-263/
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