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@article{JRAM_1975__273_151553, author = {Makoto Ishida}, title = {On 2-rank of the ideal class groups of algebraic number fields.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {165--169}, publisher = {mathdoc}, volume = {273}, year = {1975}, zbl = {0299.12009}, url = {http://geodesic.mathdoc.fr/item/JRAM_1975__273_151553/} }
Makoto Ishida. On 2-rank of the ideal class groups of algebraic number fields.. Journal für die reine und angewandte Mathematik, Tome 273 (1975), pp. 165-169. http://geodesic.mathdoc.fr/item/JRAM_1975__273_151553/