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@article{10_4064_fm_81_1_49_56, author = {J. Hickman}, title = {A problem on series of ordinals}, journal = {Fundamenta Mathematicae}, pages = {49--56}, publisher = {mathdoc}, volume = {81}, number = {1}, year = {1973}, doi = {10.4064/fm-81-1-49-56}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-81-1-49-56/} }
J. Hickman. A problem on series of ordinals. Fundamenta Mathematicae, Tome 81 (1973) no. 1, pp. 49-56. doi : 10.4064/fm-81-1-49-56. http://geodesic.mathdoc.fr/articles/10.4064/fm-81-1-49-56/
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